This new Rock River Arms LAR-15 rifle fires the 5.56mm/.223 round. It has a 22" stainless heavy barrel with an overall black finish. This semi-auto rifle has an A2 buttstock with storage, a rubber Hogue pistol grip, an aluminum free floating fluted handguard, a flattop picatinny receiver rail, a gas block rail, and a 2 stage trigger. This rifle comes with hard case, manual, and one 20 round magazine. This is Rock River Arms model #AR1520.