CMMG MK57 FUNDAMENTALS EXPLAINED

As CMMG constructed a brand name partly by supporting and innovating unique calibers in the AR platform, the addition of the 5.7x28mm Mk57 short-barrel rifle here is likely only the beginning.The projectiles would stick or drag in there and also the follower would bind. Since the ProMags have no inward-projecting component and depart far more clea