The Barrett M82A1 is the rifle that defined the anti-materiel semi-automatic category. The 29-inch barrel version delivers maximum muzzle velocity and is the standard US military configuration, designated M107 in Army/USMC service. The recoil-operated action uses a rotating bolt and features a spring-loaded buffer system that substantially reduces felt recoil for a .50 BMG platform. The M82A1 has been used in every major US military engagement since the Gulf War. Type: Rifle Action: Semi-Automatic Caliber: .50 BMG Capacity: 10 Year introduced: 1989, USA Weight: 280 oz Overall length: 57" Status: Active Military use: Yes Intended use: Military, Anti-Materiel