The original Barrett M82A1 is a recoil-operated, semi-automatic anti-materiel rifle chambered in .50 BMG. Adopted by the US military as the M107, it has seen service in every major conflict since the Gulf War. Type: Rifle Action: Semi-Automatic Caliber: .50 BMG Capacity: 5 Year introduced: 1982, USA Weight: 320 oz Overall length: 57" Status: Discontinued Intended use: Anti-Materiel, Military, Long-Range