main design characteristics of the MSBS rifle 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 rifle 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 rifle features fully ambidextrous controls and Picatinny rail, and it may also be fed from standard STANAG magazines. 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. Following the adoption of the rifle 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. During the 2022 Russian invasion of Ukraine 10,000 Grot C16A2 rifles were sent to the Ukrainian military. 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 × 39 mm rounds as specified by the customer, along with 40 mm grenade launchers and optical sights DCM-1 Szafir manufactured by PCO S.A. On January 2, 2023, the Armament Agency concluded with FB_"Łucznik"_Radom another annex to the framework agreement of July 8, 2020 for the delivery to the Polish Armed Forces of approximately 70,000 5.56 mm MSBS GROT automatic rifles for over PLN 826 million gross. On Friday, February 24, 2023, Deputy Prime Minister, Minister of Defense Mariusz Błaszczak approved the contract signed by FB_"Łucznik"_Radom and the Armament Agency, worth over PLN 11 million gross, for the supply of 250 GROT 762N sniper rifles powered by 7.62 mm x 51 NATO ammunition for of the Polish Armed Forces. Another annex to the framework agreement was also signed for the supply of additional MSBS GROT