LITTLE KNOWN FACTS ABOUT CMMG MK57.

As CMMG constructed a brand partly by supporting and innovating exceptional calibers in the AR platform, the addition from the 5.7x28mm Mk57 shorter-barrel rifle below is probably going only the start.The projectiles would stick or drag in there plus the follower would bind. Since the ProMags haven't any inward-projecting element and go away a lot