Tags: Weapon.
MSBS-556 (short for Modułowy System Broni Strzeleckiej kalibru 556 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.
