CMMG Mutant 1,000 Round Follow-Up Test

    After sending his MK 47 Mutant back to the manufacturer following its failure in a previous 1,000 round shooting session, Mrgunsngear has gotten the rifle back from CMMG, with a new locking compound applied to the gas block. Naturally, it’s time for another 1,000 round test, to see how the new setup holds up:


    The rifle passed this time, with two failures to feed, each with a separate Tapco magazine, and each with rounds in a similar position in each magazine. It’s pretty understandable that in the wide variety of different AK magazines available, some would work and some would not, especially with a totally new rifle that has its own feed geometry different than an AK’s. The fact that the magazines that failed were commercial magazines, and not military ones subject to more stringent specifications, is further unsurprising. I don’t feel those two failures reflect all that negatively on the rifle itself.

    No word yet if the new locking compound will be put on all future CMMG MK 47 rifles. My personal preference there would be for staked screws, but the locking compound is clearly a major improvement over the old Loctite that was being used on the gas block in the first test.

    Nathaniel F

    Nathaniel is a history enthusiast and firearms hobbyist whose primary interest lies in military small arms technological developments beginning with the smokeless powder era. He can be reached via email at [email protected]


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