The Barrett M82, standardized by the U.S. military as the M107, is a recoil-operated, semi-automatic anti-materiel sniper system developed by the American Barrett Firearms Manufacturing company. Despite its designation as an anti-materiel rifle, it is used by some armed forces as an anti-personnel system. It is also called the Light Fifty for its .50 BMG chambering and significantly lighter weight compared to previous applications. The weapon is found in two variants, the original M82A1 and the bullpup M82A2. The M82A2 is no longer manufactured, though the XM500 can be seen as its successor.