Product Features & Specifications
HM Defense 125MBUP556 MonoBloc Upper 223 Rem/5.56x45mm NATO 12.50" Chromoly Barrel w/Black Cerakote Finish, CNC Machined Muzzle Brake, 10.37" Free-Float M-Lok Handguard, M16 Bolt Carrier Group, Anodized 7075-T6 Aluminum
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 rail, 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.
| Brand | HM Defense |
| Model | MonoBloc |
| Caliber | 5.56x45mm NATO |
| Barrel Length Range | 12" to 12.99" |
| Firearm Fit | AR-15 Pistol |
| Gun Platform | AR-Style |
| Sights | Optic Ready |
| Barrel Finish | Black Cerakote |
| Muzzle | Muzzle Brake |
| Twist | 1:8" |
| Type | Complete |
| Handguards | 10.37" M-LOK |
| Receiver Material | 7075-T6 Aluminum |
| Barrel Description | Chrome Moly Match Grade |
| Barrel Length | 12.50" |
| Receiver Finish | Black Anodized |
| Weight | 3.14 lbs |
| Handguard Finish | Black Hard Coat Anodized |
| SKU | 129382 |
| UPC | 854164007203 |
| MPN | 125MBUP556 |
