The M107 sniper rifle is the Army’s standardized version of the Barrett M82 line in use by militaries, law enforcement and some private citizens throughout the world. Its .50-caliber BMG round can be effective against personnel, unarmored vehicles and light cover out to over a mile with a high degree of accuracy. The M107 is also called the Light Fifty for its .50 BMG (12.7×99mm NATO) chambering and significantly lighter weight compared to previous applications and the 15% heavier base M82 model. The weapon is found in two variants, the original M82A1 (and A3) and the bullpup M82A2. The M82A2 is no longer manufactured, though the XM500 can be seen as its successor.
Barrett Firearms Manufacturing was founded by Ronnie Barrett for the sole purpose of building semi-automatic rifles chambered for the powerful 12.7×99mm NATO (.50 BMG) ammunition, originally developed for and used in M2 Browning machine guns. The weapon was first sold to the Swedish Army in 1989. In 1990, the United States armed forces purchased the M82A1 during operations Desert Shield and Desert Storm in Kuwait and Iraq. About 125 rifles were initially bought by the United States Marine Corps, and orders from the Army and Air Force soon followed.
In summer 2002, the M82A1 was approved for “full materiel release”, meaning it was officially adopted as the Long Range Sniper Rifle, Caliber .50, M107. The M107 uses a Leupold 4.5–14×50 Mark 4 scope. The M107 known by the US military as the SASR—”Special Applications Scoped Rifle”, and it was and still is used as an anti-materiel rifle and explosive ordnance disposal tool.