LWRC IC-A5 with 16-inch spiral-fluted cold-hammer-forged barrel, short-stroke piston system, and Monoforge upper receiver. Premium piston-driven AR-15. Type: Semi-Auto Rifle Action: Semi-Automatic Caliber: 5.56x45mm Capacity: 30 Year introduced: 2014, USA Weight: 70 oz Overall length: 33.5" Status: Active Intended use: Duty/Military