This factory refurbished Sig Sauer 556 Classic rifle fires the .223 round. It has a 16" barrel with an overall matte black finish. This semi-auto rifle is a piston driven system. This rifle has a tapered polymer forearm, a side folding collapsible stock, an integrated sliver style rear sight and a rear diopter sight as well. It comes with hardcase, lock, and one 30 round magazine.