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The MSBS-B (above) and the MSBS-K (below)
Type Assault rifle
Place of origin Poland
Service history
Used by Ministry of National Defence (Poland),[1] The Representative Battalion of the Polish Army,[2] Prison Service (Poland)[3]
Production history
Manufacturer FB "Łucznik" Radom
Weight 3.7 kg (8.2 lb) normal, 3.4 kg (7.5 lb) bullpup
Length 980 mm (39 in) normal, 720 mm (28 in) bullpup, folding stock extended

Cartridge 5.56×45mm NATO,
Action Gas-operated short stroke, rotating bolt
Rate of fire 700–750 rounds/min
Feed system 30-round detachable STANAG magazine, possible use 10, 20, 60 and 100-round magazines
Sights Reflector sights, telescopic sights, night vision scopes, thermal weapon sights
Type Assault Rifle
Place of origin Poland
Production history
Manufacturer FB "Łucznik" Radom
Cartridge 7.62×39mm
Action Gas-operated short stroke, rotating bolt
Sights Reflector sights, telescopic sights, night vision scopes, thermal weapon sights
Type Battle Rifle
Place of origin Poland
Production history
Manufacturer FB "Łucznik" Radom
Cartridge 7.62×51mm NATO
Action Gas-operated short stroke, rotating bolt
Sights Reflector sights, telescopic sights, night vision scopes, thermal weapon sights

MSBS-5,56 (short for Modułowy System Broni Strzeleckiej kalibru 5,56 mm or English: Modular Firearm System 5.56mm Calibre) is an assault rifle currently under development as a future service rifle of the Polish Army. There are two basic variants currently being developed, based on a common upper receiver: a bullpup version and a standard version with folding, retractable stock. Thanks to a variety of modules, both variants can be easily transformed into a carbine, sniper rifle or squad light machine gun. Additionally, plans exist to develop a 12-gauge combat shotgun based on the platform,[4] as well as rifles in common Soviet calibers for export.

MSBS-7,62 is the designation of the battle rifle variant of the MSBS platform that has entered the prototype phase, chambered for the full-power 7.62×51mm NATO rifle round, to be featured during MSPO in the Fall of 2016. Planned variations include a designated marksman rifle, a sniper support rifle, and a support weapon for deployment with parachute infantry.

Currently the standard issue service rifles of the Polish armed forces are a variety of kbs wz.96 Beryl-based rifles, all of them direct descendants of the kbk AKM (a modernized variant of the AK-47 Kalashnikov), developed since the 1940s. However, that design is considered both outdated by modern standards and impossible to improve further. Because of that, work on a completely new family of assault rifles was started in Poland.


The rifle has been in development since 2007 by the WAT (Military Academy of Technology) in Warsaw in cooperation with the arms manufacturer FB Radom. The weapon is said to be operating on completely distinct internal mechanics. No further information has been disclosed however. The external design was conceived by a separate team (Adam Gawron, Bartosz Stefaniak, Grzegorz Misiołek, Maciej Sajdak) working alongside mechanical engineers.

On SHOT Show 2015 representatives of Łucznik said that in 2015 they plan to open a factory in Texas and make MSBS available to the US customers possibly as early as December.[5]

For economical reasons the main advantage of the modular weapon system is the simplified logistics because of the interchangeable parts between weapon types of the same family. Fewer parts need to be stored or if necessary, a soldier can sacrifice, for example, one standard assault rifle to repair a light machine gun. Another benefit may include ease of barrel changeability, as found in the Steyr AUG. This means a soldier may be able to adapt his rifle based on the environment he is in, such as converting a carbine to a longer barreled sniper rifle to be able to fire at a longer distance, if the situation so called for that. The benefits of this feature allow a squad to have less individual munitions. This benefit can be seen on the M26 Modular Accessory Shotgun System, which is a lightweight shotgun capable of mounting below certain assault rifles.


The following variants were designed according to requests by a primary user - the Polish Armed Forces, to replace currently used firearms like AKM and Beryl rifles, Mini-Beryl carbine and Pallad grenade launcher.

  • MSBS 556K - the conventional variant for 5.56mm ammo with classic layout
  • MSBS 556B - the bullpup variant for 5.56mm ammo, both K (for "klasyczny" - classic) and B (for "bezkolbowy" - bullpup) use many common parts and can be converted one into another
Both 5,56 variants are offered in 4 variants
  • basic variant - typical assault rifle with 16 inch (406 mm) barrel
  • rifle with grenade launcher - basic variant with dedicated 40mm underbarrel grenade launcher
  • carbine variant - the short barrel variant with 10 inch (256 mm) barrel
  • machine gun variant - equipped with heavy, thick profile 16 inch (406 mm) barrel
  • sharpshooter variant - equipped with precision 16 inch (406 mm) barrel and a two stage trigger group
  • MSBS 556R - parade model designed to be used by honor guards, adopted to fire blanks and withstand drills (should be noted that because MSBS is a modular system barrel can be easily changed to one that can shoot live ammo).
  • MSBS 762N - prototype battle rifle 7.62×51mm NATO in conventional layout
  • battle rifle - requested by airborne units, to increase firepower of every squad with a weapon firing a full-power rifle round. This variant is to have a 406mm barrel with a similar folding/adjustable stock to the standard MSBS assault rifle.
  • sharpshooter rifle - new precision rifle to replace SVD and supplement bolt action sniper rifles TRG-22 and Tor in use. This variant is to have a 508mm barrel, and is to be outfitted with a non-folding, fully adjustable stock.

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