Colt MK18 MOD0 CQB-R 10.3″ Upper


Availability: 5 in stock


Colt MK18 Upper. Factory 10.3” barrel Colt CAGE code 13629 marked under the handguards. 2021 to current production uppers.

CAGE code marked upper receiver.  CAGE code will be dot matrix stamped or roll marked.  Square or keyhole forge code.

Factory side swivel with carry handle. Double lined M4 handguards. C and MPC marked bolt carrier group.

Real deal MK18 uppers sealed in the Colt blue anti-corrosion bag. Impossible to find and left over from a small government customer production run. We have a few available. These are the only real Colt MK18 uppers on the market.

Update 3-8-24: Two more uppers placed into stock.