Complete AR-15 10.5″ 5.56/.223 Pistol Upper with 10″ M-Lok Free Float Hand Guard This upper includes a 10.5 inch barrel with 1:7 twist and tipped with an indexed A2 flash hider/suppressor threaded 1/2″-28. The A3 upper receiver comes with forward assist and ejection port cover installed. The barrel and receiver have matching M4 feed ramps. Mil-spec charging handle and heavy duty M16 bolt carrier group (BCG) included. Comfortable 10″ free floating M-Lok hand guard covers a pistol length gas sytem with a low profile micro gas block. This high quality upper is a perfect fit on a 5.56 or multi-cal AR-15 lower. Swap the complete upper assembly, lock it on and you’re ready to shoot! Comes with the Barrier Defense lifetime warranty! ****Know your states laws when purchasing gun parts.****