The ATI Omni Hybrid Pistol brings the polymer lower architecture to a pistol-configuration AR-15 with a short barrel, offering one of the lightest and most affordable AR pistols on the market. Type: Pistol Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2016, USA Weight: 44 oz Overall length: 22" Status: Active Intended use: Home Defense