Original LWRC piston carbine with 16-inch barrel and LWRC's patented self-regulating short-stroke piston. The model that put LWRC on the map. Type: Carbine Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2008, USA Weight: 118 oz Overall length: 32.5" Status: Active Intended use: Tactical, Law Enforcement, Sport Shooting