HM Defense MonoBloc 9.5" AR-Style Upper Receiver 5.56x45mm/.223 Remington - 95MBUP556

MonoBloc Upper Features The MonoBloc Upper features a HM barrel with an integral machined patented gas block and a carbine gas system. It is also 4150 Chromoly match grade tripled honed and button rifled. Its handguard is free-floating and uses a Picatinny rial Magpul M-LOK and machined from 6061-T6 aluminum. Upper and Lower receiver are made of 7075-T6 aluminum with a hard coat anodized finish. The MonoBloc Upper also includes a patented HMB bolt Mil-Spec components charging handle and a dust cover with an American Flag. MonoBloc Upper Specifications Caliber: 223 Rem Model: MonoBloc Upper Barrel Length Range: 9 to 9.99 Sights: None Optic Ready Handguard Finish: Black Hard Coat Anodized Handguards: 8.50 M-LOK Free-Float Receiver Finish: Black Hard Coat Anodized Receiver Material: 7075 T6 Aluminum Twist: 1:8 Weight: 3.70 lbs Barrel Description: 4150 Chrome Moly Match Grade Barrel Finish: Black Cerakote Barrel Length: 9.50