The CMMG MK4 in 6.8 SPC is a straightforward direct impingement carbine with a 16.1-inch chrome-lined barrel and standard mil-spec components. CMMG's 6.8 SPC offering targets hunters seeking improved terminal performance over 5.56 without significant platform changes. Type: Rifle Action: Semi-Automatic Caliber: 6.8 SPC Capacity: 26 Year introduced: 2012, USA Weight: 68 oz Overall length: 32.5" Status: Active Intended use: Hunting, Home Defense