Complete AR-15 16″ 7.62×39 H-Bar Heavy Barrel Upper w/ 10″ Free Float Slim M-Lok Hand Guard This upper comes with a 16″ heavy barrel tipped with an A2 flash hider/suppressor. The non-chrome-lined barrel and receiver have matching M4 feed ramps. Heavy duty M16 bolt carrier group and charging handle included. Comfortable 10″ free floating M-Lok hand guard.  Carbine gas system with a low profile micro gas block. This kit includes the Barrier Defense enhanced reliability firing pin for improved reliability in your AR. This high quality upper is a perfect fit on any 5.56 or multi-cal AR-15 lower. Swap the complete upper assembly, lock it on and you’re ready to shoot AK47 ammo! Be sure to pick up at least one of our 7.62×39 30 round magazines! Comes with the Barrier Defense lifetime warranty! ****Know your states laws when purchasing gun parts.****