ASK AN EXPERTDescription
- 5.56x45mm NATO caliber
- 16.1" barrel
- Direct impingement operating system
- Cmmg EML15 M-lok hand guard
- 4140CM, SBN barrel material
- Mid gas port location
- Not Included BCG
- Not Included charging handle
- Cerakote finish
- Lifetime Quality Guarantee
Make the quick switch to a 5.56mm carbine with this Cmmg Resolute Mk4 5.56x45mm Nato 16.1" No BCG or Charging Handle Upper Group (55BB40B). This upper group does NOT include BCG or charging handle. Available in a variety of Cerakote finishes.
Warranty Information
| Platform | Mk4 |
| Caliber | 5.56x45mm NATO |
| Operating System | Direct Impingement |
| Barrel Twist | 1:7 |
| Barrel Contour | MT |
| Barrel Material | 4140CM, SBN |
| Muzzle Device | Cmmg A2 Flash Hider |
| Muzzle Thread | 1/2 x 28 |
| Gas Port Location | Mid |
| Gas Block | .750" Non-Adjustable |
| Upper Receiver | Billet 6061 T6 Aluminum |
| Hand Guard | Cmmg EML15 M-Lok |
| Finish | Cerakote |
| Charging Handle | Not Included |
| Barrel Length, in | 16.1" |
| Length, in | 25" |
| Weight, lbs | 3.6 |
