The M&P15-22 Pistol is a short-barreled pistol configuration of the M&P15-22 rimfire platform with a 8.5-inch barrel and no stock, using a pistol brace-compatible buffer tube. Operates on the same blowback action as the rifle variant. Classified as a pistol under federal law, avoiding NFA short-barreled-rifle regulations. Designed for close-range plinking and training at reduced overall length. Type: Pistol Action: Semi-Automatic Caliber: .22 LR Capacity: 22 Year introduced: 2015, USA Weight: 5 oz Overall length: 25.75" Status: Active Intended use: Sport Shooting, Plinking