Premium piston-driven AR-15 with ambidextrous controls, nickel-boron coating, and spiral-fluted cold-hammer-forged barrel. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2014, USA Weight: 98 oz Overall length: 35.5" Status: Active Intended use: Tactical, Law Enforcement, Competition