Multi-Purpose Rifle version of the AR-556 with 18-inch barrel, Magpul PRS stock, and free-float handguard. Ruger's precision mid-range AR. Type: Rifle Action: Semi-Automatic Caliber: 5.56x45mm NATO Capacity: 30 Year introduced: 2018, USA Weight: 128 oz Overall length: 38.5" Status: Active Intended use: Precision Shooting, Hunting, Competition