The S&W M&P 15-22 Sport is an AR-15 pattern semi-automatic .22 LR with a 16.5-inch barrel, replicating the full controls and ergonomics of the M&P 15 centerfire for training purposes. Type: Rifle Action: Semi-Auto Caliber: .22 LR Capacity: 25 Year introduced: 2010, USA Weight: 4.85 oz Overall length: 32.8" Status: Active Intended use: Training/Plinking