Midwest Industries AR-15 Complete Upper Features The Midwest Industries AR-15 Upper is built around an 11.5 inch 4150 CrMoV barrel that is chrome lined and phosphate finished for corrosion resistance and long service life under sustained use. Chambered in .223 Wylde the barrel is threaded 1/2x28 and cut with M4 feed ramps for reliable feeding from standard AR magazines. A carbine length direct impingement gas system keeps the cycling reliable and tuned for a barrel of this length. The forged 7075 T6 aluminum upper receiver is hard coat anodized and carries T markings giving the builder a mil-spec foundation to build on. The Midwest Industries Combat Rail HD Series M-LOK handguard spans 10.5 inches providing a free float design with ample M-LOK slots for mounting lights grips slings and other accessories along the full length of the rail. An MI A2 flash hider caps the muzzle controlling flash signature while complementing the overall carbine length build. At 3.2 pounds this upper keeps the completed rifle light and maneuverable an important factor for a carbine intended for fast handling. This Midwest Industries .223 Wylde upper is available for sale at GrabAGun for builders who want a lightweight reliable foundation for their next AR-15. Midwest Industries AR-15 Complete Upper Specifications Manufacturer: Midwest Industries Caliber: .223 Wylde Barrel Length: 11.5 Barrel Material: 4150 CrMoV Chrome Lined Phosphate Barrel Description: Threaded Twist Rate: 1:8 Gas System: Carbine Length Direct Impingement Receiver Material: Forged 7075 T6 Aluminum Handguard: 10.5 Combat Rail HD M-LOK Muzzle Device: MI A2 Flash Hider Weight: 3.2 lbs Available At: GrabAGun