Professional Series M&P 15 with a 16-inch 1:8 twist stainless steel barrel, Magpul MOE furniture, and an enhanced single-stage trigger. Aimed at law enforcement and professional end users requiring tighter accuracy specifications than the Sport II. Type: Rifle Action: Semi-Automatic Caliber: 5.56 NATO Capacity: 30 Year introduced: 2009, USA Weight: 26.1 oz Overall length: 35" Status: Active Intended use: Duty / Service, Law Enforcement