CMMG MK57 FUNDAMENTALS EXPLAINED

As CMMG crafted a brand in part by supporting and innovating exclusive calibers during the AR System, the addition in the five.7x28mm Mk57 shorter-barrel rifle here is likely only the beginning.The projectiles would stick or drag in there as well as the follower would bind. As the ProMags haven't any inward-projecting portion and leave far more cl