Barrett M82A1 – Semi-Auto .50 BMG, 20″ Fluted Barrel, 10+1 Core Specifications Caliber: .50 BMG (12.7×99 NATO) Barrel: 20″ fluted, chrome-lined steel with a 1:15″ twist rate, equipped with dual barrel springs and a 2-port arrowhead muzzle brake Action: Recoil-operated, rotating bolt semi-automatic Capacity: 10 + 1 rounds via steel detachable magazine Weight: Approx. 31.45 lb (14... https://www.prime-firearms.com/product/barrett-m82a1-50bmg-20-fluted-barrel-101-black-13318/