A REVIEW OF CMMG MK57

As CMMG built a brand name partly by supporting and innovating unique calibers during the AR System, the addition from the five.7x28mm Mk57 short-barrel rifle here is probably going only the start.The projectiles would adhere or drag in there as well as the follower would bind. As the ProMags don't have any inward-projecting section and leave a gr