Pistol-configuration AR-556 with 10.5-inch barrel and SB Tactical pistol brace. Ruger's entry into the AR pistol segment. Type: Pistol Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2018, USA Weight: 80 oz Overall length: 24" Status: Active Intended use: Home Defense, Sport Shooting