THE 5-SECOND TRICK FOR CMMG MK57

As CMMG crafted a model partly by supporting and innovating exceptional calibers within the AR platform, the addition on the five.7x28mm Mk57 limited-barrel rifle below is probably going only the beginning.The projectiles would stick or drag in there and also the follower would bind. Given that the ProMags don't have any inward-projecting part and