LWRC Six8 in 6.8 SPC II with 16-inch barrel and short-stroke piston system. Optimized for terminal performance beyond 5.56 in a similar envelope. Type: Semi-Auto Rifle Action: Semi-Automatic Caliber: 6.8 SPC II Capacity: 26 Year introduced: 2011, USA Weight: 72 oz Overall length: 33.5" Status: Active Intended use: Duty/Patrol