CMMG Mk4 K 5.56mm Upper Receiver (CMMG-55BDF19)

CMMG Mk4 K 5.56mm Upper Receiver (CMMG-55BDF19)


CMMG-55BDF19

We will price match any currently priced, in stock item. In some rare instances we may not be able to match a price but will do all that we can to give you the best deal possible. (We cannot match the price if it is under our cost) Please call store at 1.800.486.7497 to check availability for immediate pickup. Please review the Terms and Conditions HERE.

Type: AR Uppers


  • Nitrided 4140 CrMo steel 12.5” barrel
  • Forged 7075-T6 receiver
  • Black Finish
Caliber 5.56mm
Barrel 12.5",” medium weight multi-role profile
Muzzle A2 comp., threaded 1/2-28
Hand Guard CMMG RKM11 KeyMod hand guard
Receiver Forged 7075-T6 AL M4 type upper
Gas Port Location Carbine