This is a basic overview to quickly identify a CMMG Mk9. The easiest way to remember the Mk9 is that it is our original 9mm Colt mag receiver.
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I would love to see a version of the 9mm Dissent be compatible with Colt pattern magazines, like the MK9 Banshee and Resolute. I have heard that the MK9 lower receiver and 9mm Dissent upper receiver are not currently compatible.
9mm