Short-barreled pistol variant of the P516 piston-operated AR platform. Uses a short-stroke piston system that runs cleaner than DI in short-barrel pistol configurations. Type: Pistol Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2011, New Hampshire, USA Weight: 73 oz Overall length: 22" Status: Discontinued Intended use: home-defense