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The '''MSBS Grot''' ({{langx|pl|Modułowy System Broni Strzeleckiej „Grot”}}, {{langx|en|Modular Firearm System "Grot"}}) is a family of modular rifles developed and manufactured by [[FB "Łucznik" Radom|FB Radom]]. Early prototypes were known as the ''MSBS Radon''.
The '''MSBS Grot''' ({{langx|pl|Modułowy System Broni Strzeleckiej „Grot”}}, {{langx|en|Modular Firearm System "Grot"}}) is a family of modular rifles developed and manufactured by [[FB "Łucznik" Radom|FB Radom]].

There are two variants of the MSBS Grot: [[assault rifle]] (in conventional and bullpup configurations) and [[designated marksman rifle]].<ref>{{cite web|url=http://www.sadefensejournal.com/wp/?p=2975|title=Radon MSBS-5.56: Poland's New Battle Rifle|publisher=Small Arms Defense Journal|date=29 May 2015|access-date=7 December 2015 |quote=''The MSBS-5.56 project was to spawn a total of 11 variants, five in classic configuration (standard rifle, grenade launching rifle, carbine, LMG, DMR) and five bull-pup equivalents, plus MSBS-R, a fixed-stock ceremonial rifle for the Polish Army’s Honor Guard Battalion.''}}</ref> Both variants use the same lock and the modular structure ensures the interchangeability of parts and accessories. The MSBS is intended to ultimately replace the [[FB Beryl]] as the Polish [[service rifle]].<ref>{{cite web|url=http://polska-zbrojna.pl/home/articleshow/23532?t=Groty-dla-polskich-zolnierzy#|title= Groty dla polskich żołnierzy|last=Wilewski|first=Krzysztof|date=2017-09-05|website=polska-zbrojna.pl|publisher=Wojskowy Instytut Wydawniczy|access-date=2021-11-23|quote=''Jest to największy kontrakt na sprzedaż broni strzeleckiej, jaki polski przemysł zbrojeniowy zdobył po 1989 roku. [...] Modułowy system broni strzeleckiej to pierwszy po II wojnie światowej karabinek maszynowy zaprojektowany i w całości wyprodukowany w Polsce''}}</ref>


==History==
==History==
The MSBS program was in development since 2007 by the [[Military University of Technology]] (WAT) in [[Warsaw]] with cooperation from the firearms manufacturer [[FB "Łucznik" Radom|Fabryka Broni Radom]],<ref>{{cite web|url=http://www.altair.com.pl/news/view?news_id=4810|title="Nowy MSBS-5,56"|website=Altair.com.pl|access-date=27 December 2017}}</ref><ref>{{cite web|url=http://www.magnum-x.pl/artykul/nowymsbs556|title=Nowa Technika Wojskowa: "Nowy MSBS-5,56"|website=Magnum-x.pl|access-date=27 December 2017}}</ref> and was designed to replace the [[FB Beryl]] as the standard-issue service rifle of the Polish Armed Forces.
The MSBS program was in development since 2007 by the [[Military University of Technology]] (WAT) in [[Warsaw]] with cooperation from the firearms manufacturer [[FB "Łucznik" Radom|Fabryka Broni Radom]],<ref>{{cite web|url=http://www.altair.com.pl/news/view?news_id=4810|title="Nowy MSBS-5,56"|website=Altair.com.pl|access-date=27 December 2017}}</ref><ref>{{cite web|url=http://www.magnum-x.pl/artykul/nowymsbs556|title=Nowa Technika Wojskowa: "Nowy MSBS-5,56"|website=Magnum-x.pl|access-date=27 December 2017}}</ref> and was designed to replace the [[FB Beryl]] as the standard-issue service rifle of the Polish Armed Forces<ref>{{cite web|url=http://polska-zbrojna.pl/home/articleshow/23532?t=Groty-dla-polskich-zolnierzy#|title= Groty dla polskich żołnierzy|last=Wilewski|first=Krzysztof|date=2017-09-05|website=polska-zbrojna.pl|publisher=Wojskowy Instytut Wydawniczy|access-date=2021-11-23|quote=''Jest to największy kontrakt na sprzedaż broni strzeleckiej, jaki polski przemysł zbrojeniowy zdobył po 1989 roku. [...] Modułowy system broni strzeleckiej to pierwszy po II wojnie światowej karabinek maszynowy zaprojektowany i w całości wyprodukowany w Polsce''}}</ref>.


Early prototypes were known as the ''MSBS Radon''.
During initial tests conducted by the Military University of Technology, the MSBS-5.56 and its counterpart [[Heckler & Koch HK416|HK416]] were subjected to comparative testing of the barrel and hand-guard for overheating during an intensive firing schedule. According to the tests, MSBS yielded the better results of the two rifles despite having a relatively light and longer barrel profile.<ref>{{cite web | title =MSBS Grot w testach z najlepszymi | url =https://defence24.pl/msbs-grot-w-testach-z-najlepszymi | website =Defence24 | date =12 December 2017| access-date =19 April 2022|quote= ''Wedle informacji do których dotarł portal Defence24.pl Wojskowa Akademia Techniczna, przeprowadziła testy porównawcze nagrzewania się łóż karabinków automatycznych używanych przez Siły Zbrojne RP, w tym nowo wprowadzanych MSBS-5,56K Grot, Beryli, jak i – dla uzyskania danych porównawczych – niemieckich karabinków Heckler und Koch 416. Test zrealizowano w celu określenia warunków użytkowych broni w przypadku potrzeby prowadzenia ognia o bardzo dużej intensywności. Przebieg prób potwierdził wysokie parametry karabinków MSBS - lepsze niż uznany i ceniony m.in. w środowiskach wojsk specjalnych HK 416. [...] Uzyskanie wyników lepszych od tak popularnej broni jak HK416 sprawia, że można uznać, że MSBS pod względem nagrzewania się nie odbiega od światowej czołówki, a nawet ją przewyższa.''}}</ref> Additional tests have also shown that MSBS is less susceptible to jamming when using lower quality ammunition or when it is insufficiently maintained,<ref>{{cite web | title =MSBS Grot Rifle. A New Generation of Polish Weapons | url =https://defence24.com/industry/msbs-grot-rifle-a-new-generation-of-polish-weapons-analysis | website =Defence24 | date =12 December 2017| access-date = 19 April 2022|quote= ''The tests have shown that Grot is less susceptible to jamming when using low quality ammo or when shooting from a dirty barrel in intense battle, or when it is insufficiently maintained, also when compared to the weapons used by the Special Forces now.''}}</ref> and had a more manageable recoil when fired in full-auto compared to other [[assault rifles]] chambered in the [[5.56×45mm NATO|5.56]] cartridge, such as FB Beryl, HK416, [[FN SCAR-L]] or [[CZ BREN 2]].<ref>{{cite AV media | title =GROT RIFLE TESTS! Compare new Grot rifle to four other rifles! | medium =YouTube | publisher =Szkoła Partyzantów | location =[[Military University of Technology]] in [[Warsaw]], [[Poland]] | date =6 February 2018 | url =}}</ref>


During initial tests conducted by the Military University of Technology, the MSBS-5.56 and its counterpart [[Heckler & Koch HK416|HK416]] were subjected to comparative testing of the barrel and hand-guard for overheating during an intensive firing schedule.
One of the main design characteristics of the MSBS-5.56 is the modular weapon system. If necessary, a soldier can sacrifice, for example, one standard [[assault rifle]] to quickly repair a [[light machine gun]] during a firefight. Another feature of the MSBS Grot is barrel changeability, as found on the [[Steyr AUG]]. This means a soldier may be able to adapt their rifle based on the environment they are in, such as converting a [[carbine]] to a designated [[marksman rifle]], in order to engage targets at a greater range. The benefits of this feature allow an [[infantry]] [[squad]] to have fewer specialised weapons. MSBS may also be used with components other than the ones manufactured domestically, and it is the first Polish rifle fully compliant with the NATO standards. The MSBS-5.56 features fully ambidextrous controls and [[Picatinny rail]], and it may also be fed from standard [[STANAG magazine]]s.<ref>{{cite web | title =MSBS Grot Rifle. A New Generation of Polish Weapons | url =https://defence24.com/industry/msbs-grot-rifle-a-new-generation-of-polish-weapons-analysis | website =Defence24 | date =12 December 2017| access-date = 19 April 2022|quote= ''MSBS may also be used with components other than the ones manufactured domestically. It is the first Polish carbine fully compliant with the NATO standards. Not only does it feature Picatinny rails that may be freely reconfigured, it may also be fed from standard STANAG magazines, such as the ones coming from the German HK416, British SA80 or Czech Bren 2 or the US M4 weapons. During the tests in the Territorial Defence component, the weapon was verified with several magazines delivered by a variety of manufacturers.''}}</ref>


According to the tests, MSBS yielded the better results of the two rifles despite having a relatively light and longer barrel profile.<ref>{{cite web |title=MSBS Grot w testach z najlepszymi |url=https://defence24.pl/msbs-grot-w-testach-z-najlepszymi |website=Defence24 |date=12 December 2017 |access-date=19 April 2022 |quote=''Wedle informacji do których dotarł portal Defence24.pl Wojskowa Akademia Techniczna, przeprowadziła testy porównawcze nagrzewania się łóż karabinków automatycznych używanych przez Siły Zbrojne RP, w tym nowo wprowadzanych MSBS-5,56K Grot, Beryli, jak i – dla uzyskania danych porównawczych – niemieckich karabinków Heckler und Koch 416. Test zrealizowano w celu określenia warunków użytkowych broni w przypadku potrzeby prowadzenia ognia o bardzo dużej intensywności. Przebieg prób potwierdził wysokie parametry karabinków MSBS - lepsze niż uznany i ceniony m.in. w środowiskach wojsk specjalnych HK 416. [...] Uzyskanie wyników lepszych od tak popularnej broni jak HK416 sprawia, że można uznać, że MSBS pod względem nagrzewania się nie odbiega od światowej czołówki, a nawet ją przewyższa.''}}</ref>
Currently, the rifle is in service with the Polish [[Territorial Defence Force (Poland)|Territorial Defence Forces]] and is scheduled to replace [[FB Beryl]] as the primary [[infantry]] weapon and [[service rifle]] of the [[Polish Armed Forces]].<ref name="polskieradio.pl">{{cite web|url=http://www.polskieradio.pl/5/3/Artykul/1842593,Umowa-na-53-tysiace-karabinkow-Grot-podpisana|title=Umowa na 53 tysiące karabinków Grot. W tym roku armia dostanie tysiąc sztuk|website=Polskieradio.pl|access-date=27 December 2017}}</ref> Following the adoption of the MSBS-5.56 by the Polish military, the ''Grot'' moniker has been added to the MSBS name in honor of the [[Home Army]] commander, General [[Stefan Rowecki|Stefan "Grot" Rowecki]].<ref name="polskieradio.pl"/><ref>{{cite web|url=http://polska-zbrojna.pl/home/articleshow/23532?t=Groty-dla-polskich-zolnierzy#|title= Groty dla polskich żołnierzy|last=Wilewski|first=Krzysztof|date=2017-09-05|website=polska-zbrojna.pl|publisher=Wojskowy Instytut Wydawniczy|access-date=2021-11-23|quote= ''Przy okazji podpisania kontraktu przedstawiciele producenta – Fabryki Broni „Łucznik” z Radomia – ujawnili, że Ministerstwo Obrony Narodowej zgodziło się, aby broń znana do tej pory jako MSBS, nosiła nazwę wyróżniającą Grot. To nawiązanie do konspiracyjnego pseudonimu gen. dyw. Stefana Roweckiego, komendanta głównego Związku Walki Zbrojnej i Armii Krajowej.''}}</ref>


Additional tests have also shown that MSBS is less susceptible to jamming when using lower quality ammunition or when it is insufficiently maintained,<ref>{{cite web | title =MSBS Grot Rifle. A New Generation of Polish Weapons | url =https://defence24.com/industry/msbs-grot-rifle-a-new-generation-of-polish-weapons-analysis | website =Defence24 | date =12 December 2017| access-date = 19 April 2022|quote= ''The tests have shown that Grot is less susceptible to jamming when using low quality ammo or when shooting from a dirty barrel in intense battle, or when it is insufficiently maintained, also when compared to the weapons used by the Special Forces now.''}}</ref> and had a more manageable recoil when fired in full-auto compared to other [[assault rifles]] chambered in the [[5.56×45mm NATO|5.56]] cartridge, such as FB Beryl, HK416, [[FN SCAR-L]] or [[CZ BREN 2]].<ref>{{cite AV media |title=GROT RIFLE TESTS! Compare new Grot rifle to four other rifles! |medium=YouTube |publisher=Szkoła Partyzantów |location=[[Military University of Technology]] in [[Warsaw]], [[Poland]] |date=6 February 2018 |url=}}</ref>
During the [[2022 Russian invasion of Ukraine]] 10,000 Grot C16A2 rifles were sent to the [[Armed Forces of Ukraine|Ukrainian military]].<ref name="MSBS Grot">{{cite web | title = MSBS Grot w rękach żołnierzy ukraińskich | url = https://defence24.pl/przemysl/msbs-grot-w-rekach-zolnierzy-ukrainskich | website = Defence24 | date = 11 May 2022 | access-date = 12 May 2022}}</ref><ref>{{cite web | title = Ukraińcy dostali polskie karabinki Grot | url = https://www.tvp.info/60132318/ukraina-polskie-karabinki-grot-dotarly-do-zolnierzy-zobacz-wideo | website = TVP.info | date = 12 May 2022 | access-date = 12 May 2022}}</ref><ref>{{cite web | title = GROTowisko-22 | url = https://defence24.pl/sily-zbrojne/grotowisko-22 | website = Defence24 | date = 8 June 2022 | access-date = 16 May 2022| quote= ''Śiły Zbrojne Ukrainy rozpoczynają eksploatację pierwszej partii >10 tysięcy karabinów GROT głównie w wersji A1+''}}</ref>


== Design ==
On May 9, 2022, the public was informed about the conclusion of an agreement between the Polish Armaments Group and an undefined [[East Africa]]n country for the supply of an unspecified number of MSBS Grot assault rifles chambered for 7.62×39mm rounds as specified by the customer, along with 40&nbsp;mm grenade launchers and optical sights DCM-1 Szafir <ref>{{cite web | url=https://pcosa.com.pl/en/dcm-1-szafir-modular-day-sight/ | title=DCM-1 SZAFIR modular day sight | date=13 August 2018 }}</ref> manufactured by PCO S.A.<ref>{{Cite web|url=https://defence24.pl/przemysl/grot-w-afryce-kolejny-klient-eksportowy|title=Grot w Afryce. Kolejny klient eksportowy|website=defence24.pl|date=19 May 2022 |quote= ''Polska Grupa Zbrojeniowa zawarła kontrakt na dostawy karabinków MSBS Grot na naboje 7,62 × 39 mm wraz z granatnikami kalibru 40 mm i celownikami optycznymi wyprodukowanymi przez Przemysłowe Centrum Optyki (PCO).''}}</ref>
The MSBS Grot is a selective fire modular assault rifle which is capable of semi-automatic, 3-round burst and fully automatic fire. It has a cyclic rate of fire of around 700–900 rounds per minute.


The MSBS-5.56 features fully ambidextrous controls and [[Picatinny rail]], and it may also be fed from standard [[STANAG magazine]]s.<ref>{{cite web |date=12 December 2017 |title=MSBS Grot Rifle. A New Generation of Polish Weapons |url=https://defence24.com/industry/msbs-grot-rifle-a-new-generation-of-polish-weapons-analysis |access-date=19 April 2022 |website=Defence24 |quote=''MSBS may also be used with components other than the ones manufactured domestically. It is the first Polish carbine fully compliant with the NATO standards. Not only does it feature Picatinny rails that may be freely reconfigured, it may also be fed from standard STANAG magazines, such as the ones coming from the German HK416, British SA80 or Czech Bren 2 or the US M4 weapons. During the tests in the Territorial Defence component, the weapon was verified with several magazines delivered by a variety of manufacturers.''}}</ref>
The Grot A3 was publicly presented at the Grotowisko 2024 small-arms conference, held in [[Zegrze]] from June 22 to 23, 2024.<ref name="J">{{cite web|url=https://www.janes.com/osint-insights/defence-news/defence/polish-armys-new-grot-a3-assault-rifle-revealed|title=Polish army's new Grot A3 assault rifle revealed|date=2024-07-05|publisher=Janes|author=Jakub Link-Lenczowski}}</ref> Its development was based on lessons learned from the conflict in Ukraine.<ref>{{cite web|url=https://mil.in.ua/en/news/grot-a3-rifle-presented-in-poland/|title=Grot A3 rifle presented in Poland|date=2024-06-24|publisher=Militarnyi}}</ref>


=== Configurations ===
In January 2025, a photo appeared on the [[Twitter|X]] website (formerly Twitter) showing small arms captured by soldiers of the [[Democratic Republic of the Congo]] from [[March 23 Movement|M23 rebels]] - among them a Grot carbine powered by 7.62 x 39 mm ammunition.<ref>{{Cite web |last=Świerkowski |first=Adam |date=2025-01-08 |title=Polski Grot w rękach afrykańskich rebeliantów |url=https://defence24.pl/sily-zbrojne/polski-grot-w-rekach-afrykanskich-rebeliantow |access-date=2025-01-30 |website=defence24.pl |language=pl}}</ref>
Both the MSBS Grot C and MSBS Grot B are planned in 5 different configurations and have many common interchangeable parts and can be converted from one to the other:<ref>{{Cite web |title=» MSBS |url=http://fabrykabroni.pl/en/produkty/karabiny/msbs/ |access-date=2017-08-13 |website=Fabrykabroni.pl |language=en-US}}</ref><ref>{{Cite news |title=Polish Rifles for the Polish Armed Forces. MSBS Modular Firearms System |url=http://www.defence24.com/553368,polish-rifles-for-the-polish-armed-forces-msbs-modular-firearms-system |access-date=2017-08-13 |website=Defence24.com}}</ref>
{| class="wikitable"
|+
!Configuration
!Description
|-
|[[Assault rifle]]
|Standard assault rifle configuration with {{convert|16|inch|abbr=on}} barrel.
|-
|Assault rifle with [[Grenade launcher#Attached|underbarrel grenade launcher]]
|Similar to the assault rifle configuration but with a [[40 mm grenade#40×46 mm LV (40 mm Low Velocity)|40×46mm]] underbarrel grenade launcher equipped.
|-
|[[Carbine]]
|Short barrel variant with a {{convert|10|inch|abbr=on}} barrel.
|-
|Carbine with underbarrel grenade launcher
|Similar to the carbine configuration but with a 40×46mm underbarrel grenade launcher equipped.
|-
|[[Machine gun]]
|Essentially an automatic rifle variant for both Grot C and Grot B. It features a heavier barrel fitted with a flash hider, and the bayonet-mount was removed. This variant is meant to be used with high-capacity magazines. Surefire MAG5-60 were used for demonstration purposes.<ref>{{Cite web |date=2021-05-17 |title=Complete family of MSBS-5,56 rifles |url=https://milmag.pl/en/complete-family-of-msbs-556-rifles/#machine-gun |access-date=2023-04-16 |website=MILMAG |language=en-US}}</ref>
|-
|[[Designated marksman rifle]]
|Designated marksman rifle variant fitted with a lighter and more precise 16 in (410&nbsp;mm) and 20 in (508&nbsp;mm) barrel, and has a two stage trigger group<ref>{{cite web |date=29 May 2015 |title=Radon MSBS-5.56: Poland's New Battle Rifle |url=http://www.sadefensejournal.com/wp/?p=2975 |access-date=7 December 2015 |publisher=Small Arms Defense Journal |quote=''The MSBS-5.56 project was to spawn a total of 11 variants, five in classic configuration (standard rifle, grenade launching rifle, carbine, LMG, DMR) and five bull-pup equivalents, plus MSBS-R, a fixed-stock ceremonial rifle for the Polish Army’s Honor Guard Battalion.''}}</ref>.
|}
Currently only the MSBS Grot C in assault rifle, carbine, configuration with a grenade launcher, MSBS Grot R and MSBS Grot S are available.

The MSBS Grot B, and the machine gun and designated marksman rifle configurations are not yet produced. Conversion kits between variants are also not yet available.

=== Modular system ===
One of the main design characteristics of the MSBS-5.56 is the modular weapon system.

If necessary, a soldier can sacrifice, for example, one standard [[assault rifle]] to quickly repair a [[light machine gun]] during a firefight.

=== Calibre conversion ===
Another feature of the MSBS Grot is barrel changeability, as found on the [[Steyr AUG]].

This means a soldier may be able to adapt their rifle based on the environment they are in, such as converting a [[carbine]] to a designated [[marksman rifle]], in order to engage targets at a greater range.

The benefits of this feature allow an [[infantry]] [[squad]] to have fewer specialised weapons. MSBS may also be used with components other than the ones manufactured domestically, and it is the first Polish rifle fully compliant with the NATO standards.

Conversion kit to change the calibre to [[7.62×39mm]] is available.<ref>{{cite web |title=» Zestaw Konwersyjny kal. 7.62×39 mm do karabinka MSBS GROT |url=https://fabrykabroni.pl/2021/10/25/zestaw-konwersyjny-kal-7-62x39-mm-do-karabinka-msbs-grot/}}</ref>


==Variants==
==Variants==
Line 59: Line 99:
[[File:Pierwsze strzelanie WOT z systemu JAVELIN.jpg|thumb|WOT soldiers with MSBS Grot C16 and [[FGM-148 Javelin|Javelin]] missile launcher]]
[[File:Pierwsze strzelanie WOT z systemu JAVELIN.jpg|thumb|WOT soldiers with MSBS Grot C16 and [[FGM-148 Javelin|Javelin]] missile launcher]]


=== Grot C ===
The following variants were designed based on the requests from the Polish Armed Forces to replace currently used firearms such as the [[AKM]], [[FB Beryl]], [[FB Mini-Beryl]], and [[Pallad grenade launcher]].
The Grot C ({{langx|pl|klasyczny}}, {{langx|en|classic}}) is the classic configuration of the MSBS-5.56, chambered in either [[5.56×45mm NATO]] or [[7.62×39mm]] cartridge with a folding and retractable stock.<ref>{{Cite web|url=https://twobirdsflyingpub.wordpress.com/2018/06/29/pgz-small-arms-eurosatory-2018-continued/|title=PGZ SMALL ARMS–EUROSATORY 2018 (CONTINUED)|last=twobirdsflyingpub|date=2018-06-29|website=FOG HORN|language=en|access-date=2019-11-17}}</ref>


==== MSBS-5,56A0 ====
The MSBS GROT is a selective fire modular assault rifle which is capable of semi-automatic, 3-round burst and fully automatic fire. It has a cyclic rate of fire of around 700–900 rounds per minute.
Initial production, 1,000 produced.


==== FB-M1 (MSBS-5,56A1) ====
Currently only the MSBS Grot C in assault rifle, carbine, configuration with a grenade launcher, MSBS Grot R and MSBS Grot S are available. The MSBS Grot B, and the machine gun and designated marksman rifle configurations are not yet produced. Conversion kits between variants are also not yet available. Conversion kit to change the calibre to [[7.62×39mm]] is available.<ref>{{cite web |title=» Zestaw Konwersyjny kal. 7.62×39 mm do karabinka MSBS GROT |url=https://fabrykabroni.pl/2021/10/25/zestaw-konwersyjny-kal-7-62x39-mm-do-karabinka-msbs-grot/}}</ref>
First production batch: modified charging handle and additional strap mount point on the [[picatinny rail]].<ref>[https://www.youtube.com/watch?v=PTdGPbVyhiw Karabinek GROT - różnice między wersjami A0, A1, A2.] youtube.com (PL)</ref>


==== FB-M2 (MSBS-5,56A2) ====
* '''MSBS Grot C''' ({{langx|pl|klasyczny}}, {{langx|en|classic}}) is the classic configuration of the MSBS-5.56, chambered in either [[5.56×45mm NATO]] or [[7.62×39mm]] cartridge with a folding and retractable stock.<ref>{{Cite web|url=https://twobirdsflyingpub.wordpress.com/2018/06/29/pgz-small-arms-eurosatory-2018-continued/|title=PGZ SMALL ARMS–EUROSATORY 2018 (CONTINUED)|last=twobirdsflyingpub|date=2018-06-29|website=FOG HORN|language=en|access-date=2019-11-17}}</ref>
Second production batch: longer [[handguard]] to cover the gas block, reinforced [[firing pin]] for dry fire practice, improved [[pistol grip]] and [[buttstock]].<ref>[https://www.defence24.pl/system-broni-modulowej-grot--eksploatacja-wazna-faza-rozwoju-analiza System broni modułowej Grot – eksploatacja ważną fazą rozwoju &#91;ANALIZA&#93;.] defence24.pl (PL)</ref>
** MSBS-5,56A0 - initial production, 1,000 produced.

** '''FB-M1''' (MSBS-5,56A1) - first production batch: modified charging handle and additional strap mount point on the [[picatinny rail]].<ref>[https://www.youtube.com/watch?v=PTdGPbVyhiw Karabinek GROT - różnice między wersjami A0, A1, A2.] youtube.com (PL)</ref>
=== Grot B ===
** '''FB-M2''' (MSBS-5,56A2) - second production batch: longer [[handguard]] to cover the gas block, reinforced [[firing pin]] for dry fire practice, improved [[pistol grip]] and [[buttstock]].<ref>[https://www.defence24.pl/system-broni-modulowej-grot--eksploatacja-wazna-faza-rozwoju-analiza System broni modułowej Grot – eksploatacja ważną fazą rozwoju &#91;ANALIZA&#93;.] defence24.pl (PL)</ref>
* '''MSBS Grot B''' ({{langx|pl|bezkolbowy}}, {{langx|en|bullpup}}) – is similar to the MSBS Grot C but in bullpup configuration. The MSBS Grot was designed to share a universal upper receiver for both the classic and bullpup configurations, which leads to the ease of conversion by simply swapping the lower receiver.
The Grot B ({{langx|pl|bezkolbowy}}, {{langx|en|bullpup}}) is similar to the MSBS Grot C but in bullpup configuration.
The MSBS Grot was designed to share a universal upper receiver for both the classic and bullpup configurations, which leads to the ease of conversion by simply swapping the lower receiver.

* '''MSBS Grot R''' – is the representative variant of the MSBS Grot designed to be used by [[Representative Honor Guard Regiment of the Polish Armed Forces|honor guards]] which has been adapted to fire blanks and withstand drills. With the modularity of the MSBS Grot, the barrel can be swapped to fire live ammunition.
=== Grot R ===
* '''MSBS Grot S''' – civilian semi-automatic only variant of the MSBS Grot without the bayonet-mount, available with 4 different variants of barrels: 10.5-, 14.5-, and 16-inch in [[.223 Remington]] and 16-inch in [[7.62×39mm]].<ref>{{multiref
The Grot R is the representative variant of the MSBS Grot designed to be used by [[Representative Honor Guard Regiment of the Polish Armed Forces|honor guards]] which has been adapted to fire blanks and withstand drills. With the modularity of the MSBS Grot, the barrel can be swapped to fire live ammunition.

=== Grot S ===
The Grot S is the civilian semi-automatic only variant of the MSBS Grot without the bayonet-mount, available with 4 different variants of barrels: 10.5-, 14.5-, and 16-inch in [[.223 Remington]] and 16-inch in [[7.62×39mm]].<ref>{{multiref
|1 = {{cite web |title=Zestaw Konwersyjny kal. 7.62×39 mm do karabinków MSBS Grot |language=pl |website=[[Polish Armaments Group|PGZ]] |url=https://fabrykabroni.pl/produkty/akcesoria-i-czesci-zamienne-do-karabinka-msbs-grot/zestaw-konwersyjny-kal-7-62x39-mm-do-karabinkow-msbs-grot/ |access-date=2022-08-18}}
|1 = {{cite web |title=Zestaw Konwersyjny kal. 7.62×39 mm do karabinków MSBS Grot |language=pl |website=[[Polish Armaments Group|PGZ]] |url=https://fabrykabroni.pl/produkty/akcesoria-i-czesci-zamienne-do-karabinka-msbs-grot/zestaw-konwersyjny-kal-7-62x39-mm-do-karabinkow-msbs-grot/ |access-date=2022-08-18}}
|2 = {{cite web |title=Zespół Lufy 14.5" kal. 223 REM do karabinka MSBS Grot |language=pl |website=[[Polish Armaments Group|PGZ]] |url=https://fabrykabroni.pl/produkty/akcesoria-i-czesci-zamienne-do-karabinka-msbs-grot/zespol-lufy-14-5-kal-223-rem-do-karabinka-msbs-grot/ |access-date=2022-08-18}}
|2 = {{cite web |title=Zespół Lufy 14.5" kal. 223 REM do karabinka MSBS Grot |language=pl |website=[[Polish Armaments Group|PGZ]] |url=https://fabrykabroni.pl/produkty/akcesoria-i-czesci-zamienne-do-karabinka-msbs-grot/zespol-lufy-14-5-kal-223-rem-do-karabinka-msbs-grot/ |access-date=2022-08-18}}
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}}</ref>
}}</ref>


=== Grot M2 ===
Both the MSBS Grot C and MSBS Grot B are planned in 5 different configurations and have many common interchangeable parts and can be converted from one to the other:<ref>{{Cite web|url=http://fabrykabroni.pl/en/produkty/karabiny/msbs/|title=» MSBS|website=Fabrykabroni.pl|language=en-US|access-date=2017-08-13}}</ref><ref>{{Cite news|url=http://www.defence24.com/553368,polish-rifles-for-the-polish-armed-forces-msbs-modular-firearms-system|title=Polish Rifles for the Polish Armed Forces. MSBS Modular Firearms System|access-date=2017-08-13|website=Defence24.com}}</ref>
The ''M2'' was developed to address the issues found on the early production models.<ref>{{Cite web|title=System broni modułowej Grot – eksploatacja ważną fazą rozwoju [ANALIZA] - Defence24|url=https://www.defence24.pl/system-broni-modulowej-grot--eksploatacja-wazna-faza-rozwoju-analiza|access-date=2021-02-24|website=www.defence24.pl|date=29 January 2021 }}</ref><ref>{{Cite web|title=MILMAG D&S 10/2020|url=https://www.milmag.pl/magazines/htmlissue?issue_id=48&page=6|access-date=2021-02-24|website=www.milmag.pl|language=pl}}</ref> The bullpup configuration did not receive the M2 upgrade due to the lack of interest from the Polish military.


The changes included a longer upper receiver with M-LOK compatible handguard and heat stop covers, a quick-detach sling mounting points, FB made pistol grip instead of previous Magpul pistol grip due to shortage during mass production, reinforced buttstock, reinforced secondary sights, strengthened, thicker charging handle, reinforced firing pin (not interchangeable with the old one from M1), FB made polymer translucent magazine, new lock (not interchangeable with the old one from M1), and new slide (not interchangeable with the old one from M1).<ref>{{Citation |title=MSBS Grot: The Complete History of Poland's New Army Rifle | date=7 December 2022 |url=https://www.youtube.com/watch?v=R9A54ODrzq0 |access-date=2023-04-20 |language=en}}</ref>
*Assault rifle – a standard assault rifle configuration with {{convert|16|inch|abbr=on}} barrel.
*Assault rifle with [[Grenade launcher#Attached|underbarrel grenade launcher]] – similar to the assault rifle configuration but with a [[40 mm grenade#40×46 mm LV (40 mm Low Velocity)|40×46mm]] underbarrel grenade launcher equipped.
*Carbine – a short barrel variant with a {{convert|10|inch|abbr=on}} barrel.
*Carbine with underbarrel grenade launcher – similar to the carbine configuration but with a 40×46mm underbarrel grenade launcher equipped.
*Machine gun – essentially an automatic rifle variant for both Grot C and Grot B. It features a heavier barrel fitted with a flash hider, and the bayonet-mount was removed. This variant is meant to be used with high-capacity magazines. Surefire MAG5-60 were used for demonstration purposes.<ref>{{Cite web |date=2021-05-17 |title=Complete family of MSBS-5,56 rifles |url=https://milmag.pl/en/complete-family-of-msbs-556-rifles/#machine-gun |access-date=2023-04-16 |website=MILMAG |language=en-US}}</ref>
*Designated marksman rifle – a designated marksman rifle variant fitted with a lighter and more precise 16 in (410&nbsp;mm) and 20 in (508&nbsp;mm) barrel, and has a two stage trigger group.


=== Grot A3 ===
;Polish military adoption
The Grot A3 was publicly presented at the Grotowisko 2024 small-arms conference, held in [[Zegrze]] from June 22 to 23, 2024.<ref name="J">{{cite web |author=Jakub Link-Lenczowski |date=2024-07-05 |title=Polish army's new Grot A3 assault rifle revealed |url=https://www.janes.com/osint-insights/defence-news/defence/polish-armys-new-grot-a3-assault-rifle-revealed |publisher=Janes}}</ref>
Since the [[Ministry of National Defence|Polish ministry of defence]] ordered 53,000 of the MSBS assault rifles, Fabryka Broni has introduced a military naming designation for the MSBS series.<ref>{{Cite web|title=MSPO 2017: Poland Orders GROT/MSBS Rifles|url=https://www.monch.com/mpg/news/land/1965-msp-msbs.html|access-date=2021-02-24|website=www.monch.com}}</ref>


Its development was based on lessons learned from the conflict in Ukraine.<ref>{{cite web |date=2024-06-24 |title=Grot A3 rifle presented in Poland |url=https://mil.in.ua/en/news/grot-a3-rifle-presented-in-poland/ |publisher=Militarnyi}}</ref>
'''Grot''' – After the official adoption of the MSBS-5.56 by the Polish Armed Forces, the Grot name was added.


=== Grot 762N ===
'''C''', '''B''', '''R''', '''S''' – ''variants'': classic, bullpup, representative, sport (semi-auto civilian). Denoted after the Grot designation.

'''10''', '''16''', '''20''' – ''barrel lengths'', in inches. So far only the 16 in (406 mm) has been adopted by the Polish military.

'''C''', '''G''', '''M''', '''PS''' – ''configurations'': carbine, variants with grenade launcher, automatic rifle, designated marksman rifle. Denoted after the barrel length designation.

'''FB''' – Fabryka Broni, the manufacturer of this weapon system.

'''M(x)''' – number of series (x stands for the generation, for examples, ''M1'' means first generation, ''M2'' is second generation, ''M3'' is planned third generation).

The ''M2'' was developed to address the issues found on the early production models.<ref>{{Cite web|title=System broni modułowej Grot – eksploatacja ważną fazą rozwoju [ANALIZA] - Defence24|url=https://www.defence24.pl/system-broni-modulowej-grot--eksploatacja-wazna-faza-rozwoju-analiza|access-date=2021-02-24|website=www.defence24.pl|date=29 January 2021 }}</ref><ref>{{Cite web|title=MILMAG D&S 10/2020|url=https://www.milmag.pl/magazines/htmlissue?issue_id=48&page=6|access-date=2021-02-24|website=www.milmag.pl|language=pl}}</ref> The bullpup configuration did not receive the M2 upgrade due to the lack of interest from the Polish military. The changes included a longer upper receiver with M-LOK compatible handguard and heat stop covers, a quick-detach sling mounting points, FB made pistol grip instead of previous Magpul pistol grip due to shortage during mass production, reinforced buttstock, reinforced secondary sights, strengthened, thicker charging handle, reinforced firing pin (not interchangeable with the old one from M1), FB made polymer translucent magazine, new lock (not interchangeable with the old one from M1), and new slide (not interchangeable with the old one from M1).<ref>{{Citation |title=MSBS Grot: The Complete History of Poland's New Army Rifle | date=7 December 2022 |url=https://www.youtube.com/watch?v=R9A54ODrzq0 |access-date=2023-04-20 |language=en}}</ref>

== Grot 762N ==
{{Infobox weapon
{{Infobox weapon
| name = MSBS Grot 762N
| name = MSBS Grot 762N
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| feed = 20-round detachable [[Knight's Armament Company SR-25|SR-25]] magazines
| feed = 20-round detachable [[Knight's Armament Company SR-25|SR-25]] magazines
| sights = Integrated [[Picatinny rail]] for various [[Sight (device)#Optical sights|optical sights]] and Picatinny attachable [[iron sights]]
| sights = Integrated [[Picatinny rail]] for various [[Sight (device)#Optical sights|optical sights]] and Picatinny attachable [[iron sights]]
}}The Grot 762N is a [[Semi-automatic rifle|semi-automatic]] [[designated marksman rifle]] chambered in [[7.62×51mm NATO]] cartridge.
}}


The Grot 7.62N has two different configurations; one with a 508&nbsp;mm (20&nbsp;in) barrel with a fixed adjustable stock and the other with 406&nbsp;mm (16&nbsp;in) barrel with the MSBS Grot C's adjustable side-folding stock.
'''Grot 762N''' is a [[Semi-automatic rifle|semi-automatic]] [[designated marksman rifle]] chambered in [[7.62×51mm NATO]] cartridge.

Both configurations are part of the MSBS family and some of the parts of the Grot 762N, such as the stock, handguard, pistol grip, and trigger are interchangeable between 5.56mm and 7.62mm models.<ref name=":0" /><ref name=":1">{{Cite web|url=https://www.armyrecognition.com/mspo_2019_news_official_show_daily/mspo_2019_new_sniper_rifle_based_on_msbs-grot_assault_rifle.html|website=www.armyrecognition.com|title= MSPO 2019: New sniper rifle based on MSBS-GROT assault rifle|date=3 September 2019 |access-date=2019-11-17}}</ref>

The Grot 7.62N is designed as a semi-automatic rifle but project engineers declared that a fully automatic configuration can be developed if required.<ref name=":0" />

== Adoption ==
Currently, the rifle is in service with the Polish [[Territorial Defence Force (Poland)|Territorial Defence Forces]] and is scheduled to replace [[FB Beryl]] as the primary [[infantry]] weapon and [[service rifle]] of the [[Polish Armed Forces]].<ref name="polskieradio.pl">{{cite web |title=Umowa na 53 tysiące karabinków Grot. W tym roku armia dostanie tysiąc sztuk |url=http://www.polskieradio.pl/5/3/Artykul/1842593,Umowa-na-53-tysiace-karabinkow-Grot-podpisana |access-date=27 December 2017 |website=Polskieradio.pl}}</ref>

Following the adoption of the MSBS-5.56 by the Polish military, the ''Grot'' moniker has been added to the MSBS name in honor of the [[Home Army]] commander, General [[Stefan Rowecki|Stefan "Grot" Rowecki]].<ref name="polskieradio.pl" /><ref>{{cite web |last=Wilewski |first=Krzysztof |date=2017-09-05 |title=Groty dla polskich żołnierzy |url=http://polska-zbrojna.pl/home/articleshow/23532?t=Groty-dla-polskich-zolnierzy# |access-date=2021-11-23 |website=polska-zbrojna.pl |publisher=Wojskowy Instytut Wydawniczy |quote=''Przy okazji podpisania kontraktu przedstawiciele producenta – Fabryki Broni „Łucznik” z Radomia – ujawnili, że Ministerstwo Obrony Narodowej zgodziło się, aby broń znana do tej pory jako MSBS, nosiła nazwę wyróżniającą Grot. To nawiązanie do konspiracyjnego pseudonimu gen. dyw. Stefana Roweckiego, komendanta głównego Związku Walki Zbrojnej i Armii Krajowej.''}}</ref>


The MSBS-7.62N project began in the end of 2015 when Polish Military of Defence announced analytical works for the replacement program of their [[Dragunov sniper rifle|SVD Dragunov]] marksman rifle and supplement the [[Bolt action|bolt-action]] [[Sako TRG|TRG-22]] and [[WKW Wilk|Tor]] sniper rifles currently in service. It was led by the team of Fabryka Broni Łucznik-Radom and Wojskowa Akademia Techniczna (WAT) engineers.<ref name=":0">{{Cite web|url=https://fragoutmag.com/fb-radom-msbs-762n-308-win/|title=FB Radom MSBS-7,62N .308 Win|last=Out! #21|first=Frag|date=2018-09-02|website=Frag Out! Magazine|language=en-US|access-date=2019-11-17}}</ref>
The MSBS-7.62N project began in the end of 2015 when Polish Military of Defence announced analytical works for the replacement program of their [[Dragunov sniper rifle|SVD Dragunov]] marksman rifle and supplement the [[Bolt action|bolt-action]] [[Sako TRG|TRG-22]] and [[WKW Wilk|Tor]] sniper rifles currently in service. It was led by the team of Fabryka Broni Łucznik-Radom and Wojskowa Akademia Techniczna (WAT) engineers.<ref name=":0">{{Cite web|url=https://fragoutmag.com/fb-radom-msbs-762n-308-win/|title=FB Radom MSBS-7,62N .308 Win|last=Out! #21|first=Frag|date=2018-09-02|website=Frag Out! Magazine|language=en-US|access-date=2019-11-17}}</ref>


==== Polish military adoption ====
The Grot 7.62N has two different configurations; one with a 508&nbsp;mm (20&nbsp;in) barrel with a fixed adjustable stock and the other with 406&nbsp;mm (16&nbsp;in) barrel with the MSBS Grot C's adjustable side-folding stock. Both configurations are part of the MSBS family and some of the parts of the Grot 762N, such as the stock, handguard, pistol grip, and trigger are interchangeable between 5.56mm and 7.62mm models.<ref name=":0" /><ref name=":1">{{Cite web|url=https://www.armyrecognition.com/mspo_2019_news_official_show_daily/mspo_2019_new_sniper_rifle_based_on_msbs-grot_assault_rifle.html|website=www.armyrecognition.com|title= MSPO 2019: New sniper rifle based on MSBS-GROT assault rifle|date=3 September 2019 |access-date=2019-11-17}}</ref>
Since the [[Ministry of National Defence|Polish ministry of defence]] ordered 53,000 of the MSBS assault rifles, Fabryka Broni has introduced a military naming designation for the MSBS series.<ref>{{Cite web |title=MSPO 2017: Poland Orders GROT/MSBS Rifles |url=https://www.monch.com/mpg/news/land/1965-msp-msbs.html |access-date=2021-02-24 |website=www.monch.com}}</ref>
{| class="wikitable"
|+
!Name
!Meaning
!Description
|-
|'''Grot'''
|Designation
|After the official adoption of the MSBS-5.56 by the Polish Armed Forces, the Grot name was added
|-
|'''C''', '''B''', '''R''', '''S'''
|Variants
|Classic, bullpup, representative, sport (semi-auto civilian). Denoted after the Grot designation.
|-
|'''10''', '''16''', '''20'''
|Barrel lengths, in inches
|So far only the 16 in (406 mm) has been adopted by the Polish military.
|-
|'''C''', '''G''', '''M''', '''PS'''
|Configurations
|Carbine, variants with grenade launcher, automatic rifle, designated marksman rifle. Denoted after the barrel length designation.
|-
|'''FB'''
|Fabryka Broni
|The manufacturer of this weapon system
|-
|'''M(x)'''
|Number of series
|x stands for the generation, for examples, ''M1'' means first generation, ''M2'' is second generation, ''M3'' is planned third generation
|}


=== Outside Poland ===
The Grot 7.62N is designed as a semi-automatic rifle but project engineers declared that a fully automatic configuration can be developed if required.<ref name=":0" />
During the [[2022 Russian invasion of Ukraine]] 10,000 Grot C16A2 rifles were sent to the [[Armed Forces of Ukraine|Ukrainian military]].<ref name="MSBS Grot">{{cite web |date=11 May 2022 |title=MSBS Grot w rękach żołnierzy ukraińskich |url=https://defence24.pl/przemysl/msbs-grot-w-rekach-zolnierzy-ukrainskich |access-date=12 May 2022 |website=Defence24}}</ref><ref>{{cite web |date=12 May 2022 |title=Ukraińcy dostali polskie karabinki Grot |url=https://www.tvp.info/60132318/ukraina-polskie-karabinki-grot-dotarly-do-zolnierzy-zobacz-wideo |access-date=12 May 2022 |website=TVP.info}}</ref><ref>{{cite web |date=8 June 2022 |title=GROTowisko-22 |url=https://defence24.pl/sily-zbrojne/grotowisko-22 |access-date=16 May 2022 |website=Defence24 |quote=''Śiły Zbrojne Ukrainy rozpoczynają eksploatację pierwszej partii >10 tysięcy karabinów GROT głównie w wersji A1+''}}</ref>

On May 9, 2022, the public was informed about the conclusion of an agreement between the Polish Armaments Group and an undefined [[East Africa]]n country for the supply of an unspecified number of MSBS Grot assault rifles chambered for 7.62×39mm rounds as specified by the customer, along with 40&nbsp;mm grenade launchers and optical sights DCM-1 Szafir <ref>{{cite web |date=13 August 2018 |title=DCM-1 SZAFIR modular day sight |url=https://pcosa.com.pl/en/dcm-1-szafir-modular-day-sight/}}</ref> manufactured by PCO S.A.<ref>{{Cite web |date=19 May 2022 |title=Grot w Afryce. Kolejny klient eksportowy |url=https://defence24.pl/przemysl/grot-w-afryce-kolejny-klient-eksportowy |website=defence24.pl |quote=''Polska Grupa Zbrojeniowa zawarła kontrakt na dostawy karabinków MSBS Grot na naboje 7,62 × 39 mm wraz z granatnikami kalibru 40 mm i celownikami optycznymi wyprodukowanymi przez Przemysłowe Centrum Optyki (PCO).''}}</ref>

In January 2025, a photo appeared on the [[Twitter|X]] website (formerly Twitter) showing small arms captured by soldiers of the [[Democratic Republic of the Congo]] from [[March 23 Movement|M23 rebels]] - among them a Grot carbine powered by 7.62 x 39 mm ammunition.<ref>{{Cite web |last=Świerkowski |first=Adam |date=2025-01-08 |title=Polski Grot w rękach afrykańskich rebeliantów |url=https://defence24.pl/sily-zbrojne/polski-grot-w-rekach-afrykanskich-rebeliantow |access-date=2025-01-30 |website=defence24.pl |language=pl}}</ref>


== Users ==
== Users ==
<!--READ FIRST: This section is for cited entries for government users only. Please do not add entries into this list without a citation from a reliable source. All entries without a citation will be removed. Thank you.-->
<!--READ FIRST: This section is for cited entries for government users only. Please do not add entries into this list without a citation from a reliable source. All entries without a citation will be removed. Thank you.-->


* {{flag|Poland}}
* {{flag|Poland}}: [[Polish Armed Forces]], 184,000 planned by 2026.<ref name=":2">{{Cite web |title=Dziesiątki tysięcy Grotów dla Wojska. A to dopiero początek |url=https://defence24.pl/przemysl/dziesiatki-tysiecy-grotow-dla-wojska-a-to-dopiero-poczatek |access-date=2023-01-02 |website=defence24.pl |date=2 January 2023 |language=pl}}</ref><ref>[https://zbiam.pl/kolejne-karabinki-automatyczne-grot-i-nowe-karabiny-wyborowe-grot-762n-dla-sil-zbrojnych-rp-z-nbpwp-borsuk-w-tle/ Kolejne karabinki automatyczne GROT i nowe karabiny wyborowe GROT 762N dla Sił Zbrojnych RP z NBPWP Borsuk w tle.]</ref>
** [[Polish Armed Forces]], 184,000 planned by 2026.<ref name=":2">{{Cite web |title=Dziesiątki tysięcy Grotów dla Wojska. A to dopiero początek |url=https://defence24.pl/przemysl/dziesiatki-tysiecy-grotow-dla-wojska-a-to-dopiero-poczatek |access-date=2023-01-02 |website=defence24.pl |date=2 January 2023 |language=pl}}</ref><ref>[https://zbiam.pl/kolejne-karabinki-automatyczne-grot-i-nowe-karabiny-wyborowe-grot-762n-dla-sil-zbrojnych-rp-z-nbpwp-borsuk-w-tle/ Kolejne karabinki automatyczne GROT i nowe karabiny wyborowe GROT 762N dla Sił Zbrojnych RP z NBPWP Borsuk w tle.]</ref>
** [[Territorial Defence Force (Poland)|Territorial Defence Force]], 53,000 in 2017.<ref name=":2" />
*** [[Territorial Defence Force (Poland)|Territorial Defence Force]], 53,000 in 2017.<ref name=":2" />
* {{flag|Rwanda}}: On September 1, 2023, PGZ concluded a contract for the supply of MSBS Grot rifles with an unspecified East-Central African country.<ref>{{Cite web |url=https://milmag.pl/kolejny-kontrakt-na-dostawe-karabinkow-msbs-grot-do-afryki/ |language=pl |title=Kolejny kontrakt na dostawę karabinków MSBS Grot do Afryki |website=milmag.pl |date=September 2023 |access-date=17 February 2024}}</ref> On January 31, 2024, the Defense24 portal listed Rwanda as the recipient of Polish rifles, but it is not certain whether the deliveries concern Grot or other rifles.<ref>{{Cite web |url=https://defence24.pl/geopolityka/prezydent-duda-udaje-sie-do-afryki-opinia |language=pl |title=Prezydent Duda udaje sie do Afryki - opinia |website=defence24.pl |date=31 January 2024 |access-date=17 February 2024}}</ref> In 2024, photos circulated on the web showing a Rwandan soldier with a 7.62x39 Grot fitted with a GP grenade launcher.<ref>{{cite web|url=https://www.military.africa/2024/08/rwanda-special-operations-forces-fields-polish-grot-assault-rifles/|title=Rwanda Special Operations Forces fields Polish GROT assault rifles|author=Patrick Kenyette
* {{flag|Rwanda}}
** On September 1, 2023, PGZ concluded a contract for the supply of MSBS Grot rifles with an unspecified East-Central African country.<ref>{{Cite web |url=https://milmag.pl/kolejny-kontrakt-na-dostawe-karabinkow-msbs-grot-do-afryki/ |language=pl |title=Kolejny kontrakt na dostawę karabinków MSBS Grot do Afryki |website=milmag.pl |date=September 2023 |access-date=17 February 2024}}</ref>
** On January 31, 2024, the Defense24 portal listed Rwanda as the recipient of Polish rifles, but it is not certain whether the deliveries concern Grot or other rifles.<ref>{{Cite web |url=https://defence24.pl/geopolityka/prezydent-duda-udaje-sie-do-afryki-opinia |language=pl |title=Prezydent Duda udaje sie do Afryki - opinia |website=defence24.pl |date=31 January 2024 |access-date=17 February 2024}}</ref>
** In 2024, photos circulated on the web showing a Rwandan soldier with a 7.62x39 Grot fitted with a GP grenade launcher.<ref>{{cite web|url=https://www.military.africa/2024/08/rwanda-special-operations-forces-fields-polish-grot-assault-rifles/|title=Rwanda Special Operations Forces fields Polish GROT assault rifles|author=Patrick Kenyette
|publisher=Military Africa|date=2024-08-05}}</ref>
|publisher=Military Africa|date=2024-08-05}}</ref>
* {{flag|Ukraine}}
* {{flag|Ukraine}}: 10,000 Grot C16 FB-M1 and A2 variant assault rifles donated to the [[Armed Forces of Ukraine|Ukrainian Armed Forces]] during the [[2022 Russian invasion of Ukraine]].<ref name="MSBS Grot"/> In 2023, it was announced that an unspecified number of Grot C16 A2 rifles had been ordered by Ukraine, but later on such claims have been denied.<ref>{{cite web |title=The Minister of Defense of Poland announced the sale of GROT assault rifles to Ukraine |url=https://mil.in.ua/en/news/the-minister-of-defense-of-poland-announced-the-sale-of-grot-assault-rifles-to-ukraine/ |website=Militarnyi |access-date=25 October 2023}}</ref><ref>{{cite web |title=Ukraine Denies MSBS Grot Rifle Order from Poland |url=https://mil.in.ua/en/news/ukraine-denies-msbs-grot-rifle-order-from-poland/ |website=Militarnyi |access-date=22 January 2024}}</ref>
** 10,000 Grot C16 FB-M1 and A2 variant assault rifles donated to the [[Armed Forces of Ukraine|Ukrainian Armed Forces]] during the [[2022 Russian invasion of Ukraine]].<ref name="MSBS Grot" />
* {{Flag|United States}}: Unknown quantity sold to Special Operations Command (USSOCOM).<ref>{{Cite web |date=2022-09-15 |title=Ukraińcy sprawdzili karabinki Grot w boju. "Chwalą je..." [ROZMOWA] |url=https://gospodarka.dziennik.pl/news/artykuly/8537531,karabinki-grot-ukraina-wojna-rosja.html |access-date=2024-04-27 |website=dziennik.pl |language=pl}}</ref>
** In 2023, it was announced that an unspecified number of Grot C16 A2 rifles had been ordered by Ukraine, but later on such claims have been denied.<ref>{{cite web |title=The Minister of Defense of Poland announced the sale of GROT assault rifles to Ukraine |url=https://mil.in.ua/en/news/the-minister-of-defense-of-poland-announced-the-sale-of-grot-assault-rifles-to-ukraine/ |website=Militarnyi |access-date=25 October 2023}}</ref><ref>{{cite web |title=Ukraine Denies MSBS Grot Rifle Order from Poland |url=https://mil.in.ua/en/news/ukraine-denies-msbs-grot-rifle-order-from-poland/ |website=Militarnyi |access-date=22 January 2024}}</ref>
* {{Flag|United States}}
** Unknown quantity sold to Special Operations Command (USSOCOM).<ref>{{Cite web |date=2022-09-15 |title=Ukraińcy sprawdzili karabinki Grot w boju. "Chwalą je..." [ROZMOWA] |url=https://gospodarka.dziennik.pl/news/artykuly/8537531,karabinki-grot-ukraina-wojna-rosja.html |access-date=2024-04-27 |website=dziennik.pl |language=pl}}</ref>


=== Non-state users ===
=== Non-state users ===

Revision as of 02:42, 4 June 2025

MSBS Grot
MSBS Grot C16 FB-M1
TypeAssault rifle (MSBS Grot C)
Bullpup assault rifle (MSBS Grot B)
Place of originPoland
Service history
Used bySee Users
WarsRussian invasion of Ukraine[1]
M23 campaign[2]
Production history
DesignerAdam Gawron, Bartosz Stefaniak, Grzegorz Misiołek, Maciej Sajdak
Designed2007
ManufacturerFB Radom
Produced2007–2017 (prototypes)
2018–present
VariantsSee Variants
Specifications
Mass3.7 kg (8.2 lb) (Grot C)
3.4 kg (7.5 lb) (Grot B)
Length980 mm (39 in) (Grot C, stock extended)
720 mm (28 in) (Grot B)
Barrel length254 mm (10.0 in)
406 mm (16.0 in)
508 mm (20.0 in)
267 mm (10.5 in) (Grot S)
368 mm (14.5 in) (Grot S)
Width65 mm (2.6 in)
Cartridge5.56×45mm NATO
7.62×39mm
ActionShort-stroke gas piston, rotating bolt
Rate of fire700–900 rounds/min
Muzzle velocity870 m/s (2,900 ft/s)
Effective firing range500–800 m (547–875 yd)
Feed system30-round detachable 5.56×45mm STANAG NATO magazines, 60-round casket magazine
30-round 7.62x39mm STANAG magazine
SightsIntegrated Picatinny rail for various optical sights and Picatinny attachable iron sights

The MSBS Grot (Polish: Modułowy System Broni Strzeleckiej „Grot”, English: Modular Firearm System "Grot") is a family of modular rifles developed and manufactured by FB Radom.

History

The MSBS program was in development since 2007 by the Military University of Technology (WAT) in Warsaw with cooperation from the firearms manufacturer Fabryka Broni Radom,[3][4] and was designed to replace the FB Beryl as the standard-issue service rifle of the Polish Armed Forces[5].

Early prototypes were known as the MSBS Radon.

During initial tests conducted by the Military University of Technology, the MSBS-5.56 and its counterpart HK416 were subjected to comparative testing of the barrel and hand-guard for overheating during an intensive firing schedule.

According to the tests, MSBS yielded the better results of the two rifles despite having a relatively light and longer barrel profile.[6]

Additional tests have also shown that MSBS is less susceptible to jamming when using lower quality ammunition or when it is insufficiently maintained,[7] and had a more manageable recoil when fired in full-auto compared to other assault rifles chambered in the 5.56 cartridge, such as FB Beryl, HK416, FN SCAR-L or CZ BREN 2.[8]

Design

The MSBS Grot is a selective fire modular assault rifle which is capable of semi-automatic, 3-round burst and fully automatic fire. It has a cyclic rate of fire of around 700–900 rounds per minute.

The MSBS-5.56 features fully ambidextrous controls and Picatinny rail, and it may also be fed from standard STANAG magazines.[9]

Configurations

Both the MSBS Grot C and MSBS Grot B are planned in 5 different configurations and have many common interchangeable parts and can be converted from one to the other:[10][11]

Configuration Description
Assault rifle Standard assault rifle configuration with 16 in (410 mm) barrel.
Assault rifle with underbarrel grenade launcher Similar to the assault rifle configuration but with a 40×46mm underbarrel grenade launcher equipped.
Carbine Short barrel variant with a 10 in (250 mm) barrel.
Carbine with underbarrel grenade launcher Similar to the carbine configuration but with a 40×46mm underbarrel grenade launcher equipped.
Machine gun Essentially an automatic rifle variant for both Grot C and Grot B. It features a heavier barrel fitted with a flash hider, and the bayonet-mount was removed. This variant is meant to be used with high-capacity magazines. Surefire MAG5-60 were used for demonstration purposes.[12]
Designated marksman rifle Designated marksman rifle variant fitted with a lighter and more precise 16 in (410 mm) and 20 in (508 mm) barrel, and has a two stage trigger group[13].

Currently only the MSBS Grot C in assault rifle, carbine, configuration with a grenade launcher, MSBS Grot R and MSBS Grot S are available.

The MSBS Grot B, and the machine gun and designated marksman rifle configurations are not yet produced. Conversion kits between variants are also not yet available.

Modular system

One of the main design characteristics of the MSBS-5.56 is the modular weapon system.

If necessary, a soldier can sacrifice, for example, one standard assault rifle to quickly repair a light machine gun during a firefight.

Calibre conversion

Another feature of the MSBS Grot is barrel changeability, as found on the Steyr AUG.

This means a soldier may be able to adapt their rifle based on the environment they are in, such as converting a carbine to a designated marksman rifle, in order to engage targets at a greater range.

The benefits of this feature allow an infantry squad to have fewer specialised weapons. MSBS may also be used with components other than the ones manufactured domestically, and it is the first Polish rifle fully compliant with the NATO standards.

Conversion kit to change the calibre to 7.62×39mm is available.[14]

Variants

Prototypes of the MSBS-5.56 during the development stage in 2011 in both the conventional and bullpup layout
MSBS Grot B and MSBS Grot C
Soldiers of the Wojska Obrony Terytorialnej (WOT) with MSBS Grot C16
WOT soldiers with MSBS Grot C16 and Javelin missile launcher

Grot C

The Grot C (Polish: klasyczny, English: classic) is the classic configuration of the MSBS-5.56, chambered in either 5.56×45mm NATO or 7.62×39mm cartridge with a folding and retractable stock.[15]

MSBS-5,56A0

Initial production, 1,000 produced.

FB-M1 (MSBS-5,56A1)

First production batch: modified charging handle and additional strap mount point on the picatinny rail.[16]

FB-M2 (MSBS-5,56A2)

Second production batch: longer handguard to cover the gas block, reinforced firing pin for dry fire practice, improved pistol grip and buttstock.[17]

Grot B

The Grot B (Polish: bezkolbowy, English: bullpup) is similar to the MSBS Grot C but in bullpup configuration.

The MSBS Grot was designed to share a universal upper receiver for both the classic and bullpup configurations, which leads to the ease of conversion by simply swapping the lower receiver.

Grot R

The Grot R is the representative variant of the MSBS Grot designed to be used by honor guards which has been adapted to fire blanks and withstand drills. With the modularity of the MSBS Grot, the barrel can be swapped to fire live ammunition.

Grot S

The Grot S is the civilian semi-automatic only variant of the MSBS Grot without the bayonet-mount, available with 4 different variants of barrels: 10.5-, 14.5-, and 16-inch in .223 Remington and 16-inch in 7.62×39mm.[18]

Grot M2

The M2 was developed to address the issues found on the early production models.[19][20] The bullpup configuration did not receive the M2 upgrade due to the lack of interest from the Polish military.

The changes included a longer upper receiver with M-LOK compatible handguard and heat stop covers, a quick-detach sling mounting points, FB made pistol grip instead of previous Magpul pistol grip due to shortage during mass production, reinforced buttstock, reinforced secondary sights, strengthened, thicker charging handle, reinforced firing pin (not interchangeable with the old one from M1), FB made polymer translucent magazine, new lock (not interchangeable with the old one from M1), and new slide (not interchangeable with the old one from M1).[21]

Grot A3

The Grot A3 was publicly presented at the Grotowisko 2024 small-arms conference, held in Zegrze from June 22 to 23, 2024.[22]

Its development was based on lessons learned from the conflict in Ukraine.[23]

Grot 762N

MSBS Grot 762N
TypeDesignated marksman rifle
Place of originPoland
Production history
ManufacturerFB Radom
Specifications
Mass5.2–6 kg (11–13 lb)
Barrel length406 mm (16.0 in)
508 mm (20.0 in)
Cartridge7.62×51mm NATO
ActionShort-stroke gas piston, rotating bolt
Feed system20-round detachable SR-25 magazines
SightsIntegrated Picatinny rail for various optical sights and Picatinny attachable iron sights

The Grot 762N is a semi-automatic designated marksman rifle chambered in 7.62×51mm NATO cartridge.

The Grot 7.62N has two different configurations; one with a 508 mm (20 in) barrel with a fixed adjustable stock and the other with 406 mm (16 in) barrel with the MSBS Grot C's adjustable side-folding stock.

Both configurations are part of the MSBS family and some of the parts of the Grot 762N, such as the stock, handguard, pistol grip, and trigger are interchangeable between 5.56mm and 7.62mm models.[24][25]

The Grot 7.62N is designed as a semi-automatic rifle but project engineers declared that a fully automatic configuration can be developed if required.[24]

Adoption

Currently, the rifle is in service with the Polish Territorial Defence Forces and is scheduled to replace FB Beryl as the primary infantry weapon and service rifle of the Polish Armed Forces.[26]

Following the adoption of the MSBS-5.56 by the Polish military, the Grot moniker has been added to the MSBS name in honor of the Home Army commander, General Stefan "Grot" Rowecki.[26][27]

The MSBS-7.62N project began in the end of 2015 when Polish Military of Defence announced analytical works for the replacement program of their SVD Dragunov marksman rifle and supplement the bolt-action TRG-22 and Tor sniper rifles currently in service. It was led by the team of Fabryka Broni Łucznik-Radom and Wojskowa Akademia Techniczna (WAT) engineers.[24]

Polish military adoption

Since the Polish ministry of defence ordered 53,000 of the MSBS assault rifles, Fabryka Broni has introduced a military naming designation for the MSBS series.[28]

Name Meaning Description
Grot Designation After the official adoption of the MSBS-5.56 by the Polish Armed Forces, the Grot name was added
C, B, R, S Variants Classic, bullpup, representative, sport (semi-auto civilian). Denoted after the Grot designation.
10, 16, 20 Barrel lengths, in inches So far only the 16 in (406 mm) has been adopted by the Polish military.
C, G, M, PS Configurations Carbine, variants with grenade launcher, automatic rifle, designated marksman rifle. Denoted after the barrel length designation.
FB Fabryka Broni The manufacturer of this weapon system
M(x) Number of series x stands for the generation, for examples, M1 means first generation, M2 is second generation, M3 is planned third generation

Outside Poland

During the 2022 Russian invasion of Ukraine 10,000 Grot C16A2 rifles were sent to the Ukrainian military.[1][29][30]

On May 9, 2022, the public was informed about the conclusion of an agreement between the Polish Armaments Group and an undefined East African country for the supply of an unspecified number of MSBS Grot assault rifles chambered for 7.62×39mm rounds as specified by the customer, along with 40 mm grenade launchers and optical sights DCM-1 Szafir [31] manufactured by PCO S.A.[32]

In January 2025, a photo appeared on the X website (formerly Twitter) showing small arms captured by soldiers of the Democratic Republic of the Congo from M23 rebels - among them a Grot carbine powered by 7.62 x 39 mm ammunition.[33]

Users

  •  Poland
  •  Rwanda
    • On September 1, 2023, PGZ concluded a contract for the supply of MSBS Grot rifles with an unspecified East-Central African country.[36]
    • On January 31, 2024, the Defense24 portal listed Rwanda as the recipient of Polish rifles, but it is not certain whether the deliveries concern Grot or other rifles.[37]
    • In 2024, photos circulated on the web showing a Rwandan soldier with a 7.62x39 Grot fitted with a GP grenade launcher.[38]
  •  Ukraine
  •  United States
    • Unknown quantity sold to Special Operations Command (USSOCOM).[41]

Non-state users

See also

References

  1. ^ a b c "MSBS Grot w rękach żołnierzy ukraińskich". Defence24. 11 May 2022. Retrieved 12 May 2022.
  2. ^ a b "Polski Grot w rękach afrykańskich rebeliantów". defence24.pl (in Polish). 8 January 2025. Retrieved 2 February 2025.
  3. ^ ""Nowy MSBS-5,56"". Altair.com.pl. Retrieved 27 December 2017.
  4. ^ "Nowa Technika Wojskowa: "Nowy MSBS-5,56"". Magnum-x.pl. Retrieved 27 December 2017.
  5. ^ Wilewski, Krzysztof (5 September 2017). "Groty dla polskich żołnierzy". polska-zbrojna.pl. Wojskowy Instytut Wydawniczy. Retrieved 23 November 2021. Jest to największy kontrakt na sprzedaż broni strzeleckiej, jaki polski przemysł zbrojeniowy zdobył po 1989 roku. [...] Modułowy system broni strzeleckiej to pierwszy po II wojnie światowej karabinek maszynowy zaprojektowany i w całości wyprodukowany w Polsce
  6. ^ "MSBS Grot w testach z najlepszymi". Defence24. 12 December 2017. Retrieved 19 April 2022. Wedle informacji do których dotarł portal Defence24.pl Wojskowa Akademia Techniczna, przeprowadziła testy porównawcze nagrzewania się łóż karabinków automatycznych używanych przez Siły Zbrojne RP, w tym nowo wprowadzanych MSBS-5,56K Grot, Beryli, jak i – dla uzyskania danych porównawczych – niemieckich karabinków Heckler und Koch 416. Test zrealizowano w celu określenia warunków użytkowych broni w przypadku potrzeby prowadzenia ognia o bardzo dużej intensywności. Przebieg prób potwierdził wysokie parametry karabinków MSBS - lepsze niż uznany i ceniony m.in. w środowiskach wojsk specjalnych HK 416. [...] Uzyskanie wyników lepszych od tak popularnej broni jak HK416 sprawia, że można uznać, że MSBS pod względem nagrzewania się nie odbiega od światowej czołówki, a nawet ją przewyższa.
  7. ^ "MSBS Grot Rifle. A New Generation of Polish Weapons". Defence24. 12 December 2017. Retrieved 19 April 2022. The tests have shown that Grot is less susceptible to jamming when using low quality ammo or when shooting from a dirty barrel in intense battle, or when it is insufficiently maintained, also when compared to the weapons used by the Special Forces now.
  8. ^ GROT RIFLE TESTS! Compare new Grot rifle to four other rifles! (YouTube). Military University of Technology in Warsaw, Poland: Szkoła Partyzantów. 6 February 2018.
  9. ^ "MSBS Grot Rifle. A New Generation of Polish Weapons". Defence24. 12 December 2017. Retrieved 19 April 2022. MSBS may also be used with components other than the ones manufactured domestically. It is the first Polish carbine fully compliant with the NATO standards. Not only does it feature Picatinny rails that may be freely reconfigured, it may also be fed from standard STANAG magazines, such as the ones coming from the German HK416, British SA80 or Czech Bren 2 or the US M4 weapons. During the tests in the Territorial Defence component, the weapon was verified with several magazines delivered by a variety of manufacturers.
  10. ^ "» MSBS". Fabrykabroni.pl. Retrieved 13 August 2017.
  11. ^ "Polish Rifles for the Polish Armed Forces. MSBS Modular Firearms System". Defence24.com. Retrieved 13 August 2017.
  12. ^ "Complete family of MSBS-5,56 rifles". MILMAG. 17 May 2021. Retrieved 16 April 2023.
  13. ^ "Radon MSBS-5.56: Poland's New Battle Rifle". Small Arms Defense Journal. 29 May 2015. Retrieved 7 December 2015. The MSBS-5.56 project was to spawn a total of 11 variants, five in classic configuration (standard rifle, grenade launching rifle, carbine, LMG, DMR) and five bull-pup equivalents, plus MSBS-R, a fixed-stock ceremonial rifle for the Polish Army's Honor Guard Battalion.
  14. ^ "» Zestaw Konwersyjny kal. 7.62×39 mm do karabinka MSBS GROT".
  15. ^ twobirdsflyingpub (29 June 2018). "PGZ SMALL ARMS–EUROSATORY 2018 (CONTINUED)". FOG HORN. Retrieved 17 November 2019.
  16. ^ Karabinek GROT - różnice między wersjami A0, A1, A2. youtube.com (PL)
  17. ^ System broni modułowej Grot – eksploatacja ważną fazą rozwoju [ANALIZA]. defence24.pl (PL)
  18. ^
  19. ^ "System broni modułowej Grot – eksploatacja ważną fazą rozwoju [ANALIZA] - Defence24". www.defence24.pl. 29 January 2021. Retrieved 24 February 2021.
  20. ^ "MILMAG D&S 10/2020". www.milmag.pl (in Polish). Retrieved 24 February 2021.
  21. ^ MSBS Grot: The Complete History of Poland's New Army Rifle, 7 December 2022, retrieved 20 April 2023
  22. ^ Jakub Link-Lenczowski (5 July 2024). "Polish army's new Grot A3 assault rifle revealed". Janes.
  23. ^ "Grot A3 rifle presented in Poland". Militarnyi. 24 June 2024.
  24. ^ a b c Out! #21, Frag (2 September 2018). "FB Radom MSBS-7,62N .308 Win". Frag Out! Magazine. Retrieved 17 November 2019.{{cite web}}: CS1 maint: numeric names: authors list (link)
  25. ^ "MSPO 2019: New sniper rifle based on MSBS-GROT assault rifle". www.armyrecognition.com. 3 September 2019. Retrieved 17 November 2019.
  26. ^ a b "Umowa na 53 tysiące karabinków Grot. W tym roku armia dostanie tysiąc sztuk". Polskieradio.pl. Retrieved 27 December 2017.
  27. ^ Wilewski, Krzysztof (5 September 2017). "Groty dla polskich żołnierzy". polska-zbrojna.pl. Wojskowy Instytut Wydawniczy. Retrieved 23 November 2021. Przy okazji podpisania kontraktu przedstawiciele producenta – Fabryki Broni „Łucznik" z Radomia – ujawnili, że Ministerstwo Obrony Narodowej zgodziło się, aby broń znana do tej pory jako MSBS, nosiła nazwę wyróżniającą Grot. To nawiązanie do konspiracyjnego pseudonimu gen. dyw. Stefana Roweckiego, komendanta głównego Związku Walki Zbrojnej i Armii Krajowej.
  28. ^ "MSPO 2017: Poland Orders GROT/MSBS Rifles". www.monch.com. Retrieved 24 February 2021.
  29. ^ "Ukraińcy dostali polskie karabinki Grot". TVP.info. 12 May 2022. Retrieved 12 May 2022.
  30. ^ "GROTowisko-22". Defence24. 8 June 2022. Retrieved 16 May 2022. Śiły Zbrojne Ukrainy rozpoczynają eksploatację pierwszej partii >10 tysięcy karabinów GROT głównie w wersji A1+
  31. ^ "DCM-1 SZAFIR modular day sight". 13 August 2018.
  32. ^ "Grot w Afryce. Kolejny klient eksportowy". defence24.pl. 19 May 2022. Polska Grupa Zbrojeniowa zawarła kontrakt na dostawy karabinków MSBS Grot na naboje 7,62 × 39 mm wraz z granatnikami kalibru 40 mm i celownikami optycznymi wyprodukowanymi przez Przemysłowe Centrum Optyki (PCO).
  33. ^ Świerkowski, Adam (8 January 2025). "Polski Grot w rękach afrykańskich rebeliantów". defence24.pl (in Polish). Retrieved 30 January 2025.
  34. ^ a b "Dziesiątki tysięcy Grotów dla Wojska. A to dopiero początek". defence24.pl (in Polish). 2 January 2023. Retrieved 2 January 2023.
  35. ^ Kolejne karabinki automatyczne GROT i nowe karabiny wyborowe GROT 762N dla Sił Zbrojnych RP z NBPWP Borsuk w tle.
  36. ^ "Kolejny kontrakt na dostawę karabinków MSBS Grot do Afryki". milmag.pl (in Polish). September 2023. Retrieved 17 February 2024.
  37. ^ "Prezydent Duda udaje sie do Afryki - opinia". defence24.pl (in Polish). 31 January 2024. Retrieved 17 February 2024.
  38. ^ Patrick Kenyette (5 August 2024). "Rwanda Special Operations Forces fields Polish GROT assault rifles". Military Africa.
  39. ^ "The Minister of Defense of Poland announced the sale of GROT assault rifles to Ukraine". Militarnyi. Retrieved 25 October 2023.
  40. ^ "Ukraine Denies MSBS Grot Rifle Order from Poland". Militarnyi. Retrieved 22 January 2024.
  41. ^ "Ukraińcy sprawdzili karabinki Grot w boju. "Chwalą je..." [ROZMOWA]". dziennik.pl (in Polish). 15 September 2022. Retrieved 27 April 2024.

Other sources

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