Whether it’s the classic style or forward assist functionality that piques your interest, the Mk4 AR15 upper receiver assembly has been a staple in the CMMG® lineup. This mil-spec workhorse has been proven over the years and makes a great base to build your next AR15 upper group.
Lifetime Quality Guarantee
CMMG aims to please, that’s why every CMMG product is backed by their Lifetime Quality Guarantee against material and workmanship defects.
| PLATFORM | MK4 |
| UPPER RECEIVER | FORGED 7075-T6 ALUMINUM M4 TYPE |
| FINISH | CERAKOTE STANDARD BLACK |
- Manufacturer Part Number:
- 5BA206-AB
- Sub Category:
- Upper Receivers
- Part Type:
- Assembled Uppers
- Material:
- Aluminum
