16" AR barrel, stainless, cross-fluted, threaded. Includes gas system. http://imgur.com/a/yffMw Item Condition: New Used Open Box Public discussion (3) Tanner 2 years ago round count? Rob 2 years ago 350-500 rounds Jeff 2 years ago Twist rate? And why are you selling? You must log in to send a new comment. BLKMKT is powered by the Sharetribe marketplace platform. Want to create your own online marketplace website like BLKMKT? Learn more.