As CMMG developed a model partly by supporting and innovating unique calibers within the AR platform, the addition of your five.7x28mm Mk57 brief-barrel rifle listed here is probably going only the start.
The projectiles would stick or drag in there plus the follower would bind. Because the ProMags don't have any inward-projecting part and leave a great deal more clearance for that bullets, they had no these kinds of problem and fed all the things.
If the Mk57 locks back again on empty, you’ll discover the oversized magazine release paddle correct where you’d expect.
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That’s appropriate, this is the blowback-operated firearm, however it isn’t a straight blowback. The bolt head actually locks into battery, rotating and locking its lugs into barrel extension lugs the same as a typical AR-15.
Swapping for the light buffer fastened that totally and likewise resulted in additional cmmg mk57 self-confident ejection of vacant brass.
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I had a blast capturing this point. Even though my AAC Aspect 2 isn’t technically rated for 5.7, I abused the heck away from it with approximately four hundred rounds despatched downrange In brief get and various click here mag dumps. It held up just high-quality as well as the Mk57 was pretty silent and very pleasurable to shoot.
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Having a smoother induce and a more exactly-match stock, I’d provide the Mk57 5 stars with no hesitation…at a cheaper price place.
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As we’ve located with all of CMMG’s GUARDs and BANSHEEs, the Mk57 is a very well-sorted and well-tuned gun. All the things more info fits and features completely and looks like it belongs together.
Jeremy strives to gather goal details Anytime achievable, and appears to jot down accurate evaluations that mirror the real get more info person encounter. He life beyond Austin, TX.