AR-15 Complete 16″ 300 AAC Blackout Upper w/ Free Float 12″ Slim M-Lok Hand Guard Upper includes a 16″ barrel tipped with an A2 flash hider/suppressor. The gas system is pistol length (with a low-profile micro gas block) allowing for trouble free use of all sub-sonic, super-sonic and whisper ammo. A3 billet 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 floating 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.****