HM Defense 12.50" Classic Upper 5.56x45mm 1:8 M-LOK Rail Mid-Length with BCG and CH, Black - 125MBUP556

The HM Defense Monobloc Upper sets a new standard for precision, reliability, and innovation in AR-platform performance. Featuring a triple-honed, button-rifled monobloc barrel, this upper delivers exceptional accuracy and consistency. The integrally machined gas block is built directly into the barrel, eliminating the need for aftermarket alignment and ensuring superior barrel harmonics for tighter groupings and enhanced shot placement.Engineered for dependable performance in extreme conditions, the upper includes Mil-Spec M4 feed ramps for reliable cycling. Unlike standard M16 and AR-15 bolts that are prone to failure at the cam pin hole, the HMD bolt uses a cam pin socket design to eliminate this weak point-dramatically increasing durability and reducing the risk of breakage under heavy use. Best of all, the HMD bolt is non-proprietary, making it a versatile upgrade compatible with your other AR-15 builds. Whether for duty, defense, or precision shooting, the HM Defense Monobloc Upper is built to outperform.