NOT KNOWN FACTS ABOUT CMMG MK57

As CMMG built a brand partly by supporting and innovating exclusive calibers from the AR platform, the addition of your five.7x28mm Mk57 small-barrel rifle below is likely only the start.The projectiles would stick or drag in there and the follower would bind. Given that the ProMags don't have any inward-projecting aspect and go away a lot more cl