The M82A1 with 20-inch barrel is the CQB (Close Quarters Battle) variant designed for use from vehicles, helicopters, and confined fighting positions. The shorter barrel sacrifices approximately 150 fps of muzzle velocity versus the 29-inch configuration but dramatically reduces overall length and handling weight. Preferred by special operations units that need .50 BMG capability in a more deployable package. Type: Rifle Action: Semi-Automatic Caliber: .50 BMG Capacity: 10 Year introduced: 1996, USA Weight: 262.4 oz Overall length: 53" Status: Active Military use: Yes Intended use: Military, Anti-Materiel