LITTLE KNOWN FACTS ABOUT CMMG MK57.

As CMMG built a brand name partly by supporting and innovating one of a kind calibers within the AR System, the addition with the five.7x28mm Mk57 short-barrel rifle listed here is likely only the beginning.The projectiles would stick or drag in there and the follower would bind. Since the ProMags haven't any inward-projecting element and go away