The Smith & Wesson M&P 15T is the tactical-enhanced variant of the M&P 15 line, featuring a free-float aluminum handguard with a full-length Picatinny top rail and three short side rails. The 16-inch barrel and improved furniture make it a step above the Sport II for accessory-heavy users. Type: Semi-Auto Rifle Action: Direct Impingement Caliber: 5.56x45mm Capacity: 30 Year introduced: 2011, USA Weight: 6.8 oz Overall length: 32.5" Status: Active Intended use: Home Defense, Range, Duty