Product Features & Specifications
CMMG 55BB40BMB Resolute MK4 5.56x45mm NATO 16.10", Midnight Bronze, M-LOK Free-Float Handguard for AR-Platform (No BCG or Charging Handle)
Top off your next build with this RESOLUTE Mk4 Upper Group. Chambered, this upper group is a staple for any collection and comes ready to pair with the AR15 lower group of your choice.
| Brand | CMMG |
| Category | Uppers |
| Series | MK4 |
| Model | Resolute |
| Caliber | 5.56x45mm |
| Barrel Length Range | 16" to 16.99" |
| Firearm Fit | AR-Platform |
| Gun Platform | AR-Style |
| Firearm Type | AR Platform |
| Handguards | M-LOK Free-Float |
| Thread Pattern | 1 / 2"x28 |
| Barrel Length | 16.10" |
| Receiver Finish | Midnight Bronze |
| Handguard Finish | Midnight Bronze |
