Barrett's direct impingement AR-15 with a chrome-lined hammer-forged barrel and Geissele SSA trigger. Premium quality AR-15 from the .50 BMG manufacturer. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2008, USA Weight: 6.5 oz Overall length: 35.5" Status: Active Intended use: Service, Tactical, Precision