This used Sig Sauer 716 rifle fires the 7.62mm/.308 round. It has a 16" barrel with an overall black finish. This semi-auto rifle comes with a quad railed forearm, a Magpul pistol grip w/storage, and a collapsible/lockable Magpul stock with 3 separate storage areas. This rifle comes with fold up front & rear removable sights and one 20 round magazine. This rifle has had less than 100 rounds thru it.