- Integrally machined patented gas block
- CNC machined from 6061-T6 aircraft grade aluminum
- Magpul M-LOK mounting system compatible
- Mil-Spec Forged 7075-T6 M4 Upper Receiver
- Type III Class II hard-coat black anodized finish
- CNC machined muzzle brake
- Rifle Black Cerakote finish
The HM Defense MonoBloc Upper 16in 5.56 NATO Black Cerakote 4150 Chrome Moly includes an integrally machined patented gas block. Chambered in 5.56 NATO/223 Rem, the 4150 Chromoly barrel is 16 inches in length, features a 1:8 twist ratio and a mid-length gas system. All HM Defense barrels are match grade, tripled honed and button rifled for superior accuracy.
The custom HM Defense 15 inch, free float 1913 Picatinny rail is CNC machined from 6061-T6 aircraft grade aluminum. The rail is compatible with Magpul M-LOK mounting system.
HM Monobloc upper features a Mil-Spec Forged 7075-T6 M4 Upper Receiver with Type III Class II hard-coat black anodized finish, M4 Feed Ramps, and a 1913 Picatinny rail flattop.
HM Monobloc upper includes an M16 bolt carrier group with patented HMB bolt and Mil-Spec components and charging handle. Includes dust cover engraved with American flag. Also, Monobloc upper includes CNC machined muzzle brake.
|Type of Barrel
|4150 Chrome Moly
|15" MLOK Rail
|Black Hard Coat Anodized
|4Ib 6 oz