Lightweight AR-15 pattern rifle chambered in .450 Bushmaster, a straight-wall cartridge designed for deer hunting in states with straight-wall cartridge requirements. Type: Rifle Action: Semi-Automatic Caliber: .450 Bushmaster Capacity: 5 Year introduced: 2008, USA Weight: 102 oz Overall length: 36" Status: Discontinued Intended use: Deer Hunting, Straight-Wall Hunting