Alexander Arms Beowulf AR-15 platform rifle chambered in .50 Beowulf with 16-inch barrel for large game and close-range defensive use. Type: Rifle Action: Semi-Automatic Caliber: .50 Beowulf Capacity: 7 Year introduced: 2001, USA Weight: 124.8 oz Overall length: 34.5" Status: Active Intended use: Big Game, Home Defense, CQB