Civilian recreation of the SOCOM MK12 SPR with 18-inch stainless barrel and rifle-length gas system. A precision mid-range platform. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2012, USA Weight: 136 oz Overall length: 37.5" Status: Active Intended use: Precision Shooting, Hunting