CMMG MK57 - AN OVERVIEW

As CMMG constructed a manufacturer in part by supporting and innovating unique calibers in the AR System, the addition on the 5.7x28mm Mk57 small-barrel rifle here is probably going only the start.The projectiles would adhere or drag in there as well as follower would bind. As the ProMags haven't any inward-projecting portion and depart considerab