Performance Center M&P 10 with a 20-inch stainless steel 5R rifled barrel, free-float handguard, Geissele two-stage trigger, and a sub-MOA accuracy guarantee. The longest barrel M&P 10 configuration — optimized for long-range precision over the standard 18-inch models. Type: Rifle Action: Semi-Automatic Caliber: 308 Win Capacity: 20 Year introduced: 2016, USA Weight: 9.5 oz Overall length: 40" Status: Active Intended use: Competitive Shooting, Hunting