LWRC M6A2 with 16-inch cold-hammer-forged barrel and LWRC's short-stroke piston operating system. The piston system eliminates carbon fouling in the action and reduces heat transfer to the bolt carrier, enabling reliable operation with minimal lubrication. Nickel-boron coated bolt carrier group. Type: Rifle Action: Semi-Automatic Caliber: 5.56 NATO Capacity: 30 Year introduced: 2006, USA Weight: 115 oz Overall length: 35" Status: Active Military use: Yes Intended use: Tactical, Military, Law Enforcement