Midwest Industries AR-15 Complete Upper Features The Midwest Industries Upper Receiver Group is built around a 10.5 Criterion CORE barrel chambered in .223 Wylde a chambering that handles both 5.56 NATO and .223 Remington ammunition with tight accurate tolerances. The barrel is chrome lined and phosphate coated over 4150 CrMoV steel giving it strong resistance to heat and wear during sustained firing. Threaded 1/2x28 the barrel accepts a muzzle device or suppressor to manage the recoil impulse of this carbine length direct impingement gas system. M4 feedramps ensure smooth reliable feeding from standard AR-15 magazines. The forged 7075 T6 aluminum upper receiver carries a hard coat anodized finish along with T-markings for a true mil-spec build quality. The MI-CRMHD9.25 Combat Rail HD Series M-LOK handguard gives shooters ample real estate for lights grips and other accessories while keeping the profile slim. An MI A2 flash hider caps off the muzzle for signature reduction during firing. Weighing 3.1 lbs this complete upper does not include a charging handle or bolt carrier group and it is available for sale at GrabAGun for builders completing a dedicated AR-15 platform. Midwest Industries AR-15 Complete Upper Specifications Manufacturer: Midwest Industries Model: AR-15 Complete Upper Type: Complete Upper Caliber: .223 Wylde Barrel Length: 10.5 Barrel Material: 4150 CrMoV Barrel Finish: Chrome Lined / Phosphate Twist Rate: 1:8 Gas System: Carbine Length Direct Impingement Handguard: MI-CRMHD9.25 Combat Rail HD M-LOK Receiver Material: Forged 7075 T6 Aluminum Muzzle Device: MI A2 Flash Hider Thread Pattern: 1/2x28 Weight: 3.1 lbs Available At: GrabAGun