LWRC M6A3 with 14.7-inch barrel and short-stroke piston. An earlier LWRC piston configuration with ambidextrous controls. Pinned muzzle device. Type: Semi-Auto Rifle Action: Semi-Automatic Caliber: 5.56x45mm Capacity: 30 Year introduced: 2009, USA Weight: 68 oz Overall length: 31.5" Status: Active Military use: Yes Intended use: Military/Duty