FB MSBS Grot
The FB MSBS Grot (Polish: Modułowy System Broni Strzeleckiej „Grot”, English: Modular Firearm System "Spearhead") is a family of modular assault rifle developed and manufactured by FB "Łucznik" Radom. Early prototypes were known as the MSBS-5.56 Radon.
| FB MSBS Grot | |
|---|---|
MSBS Grot C16 FB-M1 | |
| Type | Assault rifle (MSBS Grot C) Bullpup assault rifle (MSBS Grot B) |
| Place of origin | Poland |
| Service history | |
| Used by | See Users |
| Wars | Russian invasion of Ukraine |
| Production history | |
| Designer | Adam Gawron, Bartosz Stefaniak, Grzegorz Misiołek, Maciej Sajdak |
| Designed | 2007 |
| Manufacturer | FB "Łucznik" Radom |
| Produced | 2007–2017 (prototypes) 2018–present |
| Variants | See Variants |
| Specifications | |
| Mass | 3.7 kg (8.2 lb) (Grot C) 3.4 kg (7.5 lb) (Grot B) |
| Length | 980 mm (39 in) (Grot C, stock extended) 720 mm (28 in) (Grot B) |
| Barrel length | 254 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) |
| Width | 65 mm (2.6 in) |
| Cartridge | 5.56×45mm NATO 7.62×39mm |
| Action | Short-stroke gas piston, rotating bolt |
| Rate of fire | 700–900 rounds/min |
| Muzzle velocity | 870 m/s (2,900 ft/s) |
| Effective firing range | 500–800 m (547–875 yd) |
| Feed system | 30-round detachable 5.56×45mm STANAG NATO magazines, 60-round casket magazine 30-round 7.62x39mm STANAG magazine |
| Sights | Integrated Picatinny rail for various optical sights and Picatinny attachable iron sights |
There are two basic variants of the MSBS Grot: a conventional configuration assault rifle and a bullpup configuration. The MSBS is the first machine carbine fully designed and produced completely in Poland since World War II as well as the largest firearms sale contract taken on by the Polish arms industry since 1989.
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