- 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.
