This used Smith & Wesson M&P 15 rifle fires the 5.56mm/.223 round. It has a 16" M4 barrel with a mostly black finish. The Magpul furniture on this rifle is in flat dark earth. This semi-auto rifle has a MagPul collapsible stock, a flat top picatinny receiver rail, a MagPul pistol grip with storage, and an UTG quad railed forearm. This rifle comes with removeable rear MagPul flip up sights and one flat dark earth 30 round PMAG.