Description
UPPER GROUP, ENDEAVOR, Mk4, 5.56x45MM NATO, 18
UPPER GROUP, ENDEAVOR, Mk4, 5.56x45MM NATO, 18
UPPER GROUP, ENDEAVOR, Mk3, 6.5 CREEDMOOR, 24
UPPER GROUP, ENDEAVOR, Mk3,.308WIN, 24
UPPER GROUP, ENDEAVOR, Mk3, .308WIN, 20
Available in seven different Cerakote finishes, every ENDEAVOR Upper Group includes the bolt carrier group as well as a carefully curated selection of parts and accessories including:
ZEROED AR15 Ambi Charging Handle
ZEROED AR15 Polymer Dust Cover
ZEROED Muzzle Brake 5.56mm
We aim to please, that’s why every CMMG product is backed by our Lifetime Quality Guarantee against material and workmanship defects.
| Platform | Mk4 |
| Caliber | 5.56x45mm |
| Operating System | Direct Impingement |
| Barrel Length | 18 |
| Barrel Twist | 1:7 |
| Barrel Contour | MT |
| Barrel Material | 416SS, SBN |
| Barrel Twist | 1:7 |
| Muzzle Device | CMMG ZEROED Muzzle Brake |
| Muzzle Thread | 1/2 x 28 |
| Gas Port Location | Rifle |
| Gas Block | 0.750 Non-Adjustable |
| Upper Receiver | Billet 6061 T6 Aluminum |
| Hand Guard | CMMG EML15 M-LOK |
| Finish | Cerakote Standard |
| Charging Handle | CMMG ZEROED Ambi |
| Weight | 4.5 lbs |
| Length | 26.9 |
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