The LAR-9 Pistol is Rock River Arms' AR-platform 9mm in pistol configuration — no stock, 9mm Colt-pattern lower, and a short barrel that qualifies it as a pistol under federal law. The blowback operating system simplifies the design and makes it exceptionally reliable with a wide range of 9mm ammunition. Competition shooters and home defense buyers alike value the high-capacity Colt-mag compatibility. Type: Pistol Action: Semi-Automatic Caliber: 9mm Capacity: 33 Year introduced: 2008, USA Weight: 21.5 oz Overall length: 26" Status: Active Intended use: Competition, Home Defense, Plinking