Complete AR-15 16″ H-Bar 5.56*.223 Upper w/ 12″ Slim, Lightweight M-Lok Hand Guard Upper includes a 16″ heavy barrel tipped with an A2 flash hider/suppressor. Carbine gas system with a low-profile micro gas block. The A3 upper receiver comes with forward assist and ejection port cover installed. Barrel and receiver have matching M4 feed ramps. Heavy duty M16 bolt carrier group and charging handle included. Comfortable 12″ free float M-Lok hand guard. This high quality upper is a perfect fit on any 5.56 or multi-cal AR-15 lower. Swap the complete upper and you’re ready to shoot! Comes with the Barrier Defense lifetime warranty! ****Know your states laws when purchasing gun parts.****