This new Ruger SR-556 rifle fires the .223 round. It has a 16" barrel with an overall parkerized finish. This semi-auto rifle has a piston driven upper, and comes with a flat-top receiver. It has a quadrail forearm with rail covers, 6 position collapsible stock, folding front and rear sights and a Hogue-style rubber pistol grip. This rifle comes with three 30-round Magpul P magazines and a zippered case.