Complete AR-15 16″ Flat Dark Earth 7.62×39 Upper w/ 15″ Slim, Lightweight M-Lok Hand Guard This upper includes a flat dark earth billet upper receiver with mil-spec forward assist, ejection port cover and charging handle installed. The 16″ barrel is deadly accurate. The barrel and receiver have matching M4 feed ramps. It’s tipped with an indexed A2 flash hider/suppressor. It comes upgraded with a heavy duty M16 bolt carrier group. The flat dark earth theme continues through the matching 15″ free floating M-Lok hand guard. The gas system is carbine and comes with a .750″ low-profile micro gas block. Barrel twist is 1:8. 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 the lower and you’re ready to shoot! Comes with the Barrier Defense lifetime warranty! ****Know your states laws when purchasing gun parts.****