CMMG 55B59EC Upper Group, Mk4 T, 5.56mm
February 18, 2018
CMMG 55B66C7 Upper Group, Mk4 3GR, 5.56mm
February 18, 2018
CMMG 55BC76A Upper Group, Mk4 T, 5.56mm, SBN
$658.95
CMMG 55BC76A Upper Group, Mk4 T, 5.56mm, SBN
The Mk4 T Upper Group introduces CMMG’s RKM series of KeyMod free float hand guards. The CMMG 55BC76A Mk4 T, SBN Upper Group has a nitrided 4140 CrMo steel barrel in a medium taper profile in a 5.56mm caliber format.
| PRODUCT SPECIFICATIONS | |
| Caliber: 5.56mm Barrel: 16″ medium weight taper profile* Muzzle: A2 comp., threaded 1/2-28 Hand Guard: CMMG RKM11 KeyMod hand guard Receiver: Forged 7075-T6 AL M4 type |
Upper Group consists of: Upper Receiver Assembly (Upper Receiver, Ejection Port Cover, Forward Assist) Barrel Sub-Assembly Hand Guard and Barrel Nut Charging Handle Bolt Carrier Group |
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