Smith & Wesson M&P15 in 6.8 SPC with 16-inch barrel, an early mainstream manufacturer offering in the SOCOM-developed intermediate cartridge. Type: Rifle Action: Semi-Automatic Caliber: 6.8 SPC Capacity: 26 Year introduced: 2008, USA Weight: 96 oz Overall length: 32" Status: Discontinued Intended use: Hunting, Tactical