THE 5-SECOND TRICK FOR CMMG MK57

As CMMG crafted a brand in part by supporting and innovating unique calibers inside the AR platform, the addition of the 5.7x28mm Mk57 limited-barrel rifle below is probably going only the start.The projectiles would stick or drag in there and the follower would bind. As being the ProMags haven't any inward-projecting component and leave much more