The AR-556 Pistol is Ruger's factory-complete AR pistol with a 10.5-inch cold-hammer-forged barrel and SB Tactical pistol brace, backed by Ruger's reputation for quality control. Type: Pistol Action: Semi-Automatic Caliber: 5.56 NATO Capacity: 30 Year introduced: 2016, USA Weight: 80 oz Overall length: 25.75" Status: Active Intended use: Home Defense, Range, Sport