HM Defense MonoBloc 5.56x45mm AR15 Pistol Upper Assembly

The MonoBloc 5.56x45mm AR15 Pistol Upper Assembly is engineered for precision and durability. It features a 12.50" 4150 Chrome Moly match grade barrel with a patented integral gas block, offering a reliable carbine gas system. The barrel is triple honed and button rifled, ensuring exceptional accuracy. The free-floating handguard, crafted from 6061T6 aluminum, boasts a Picatinny rail and Magpul M-LOK compatibility for versatile accessory mounting. Both the upper and lower receivers are made from 7075T6 aluminum, finished with a robust hard coat anodizing for enhanced resilience. This complete upper includes a patented HMB bolt, MilSpec components, a charging handle, and a dust cover adorned with an American Flag, making it optic-ready and ideal for tactical applications.