HELPING THE OTHERS REALIZE THE ADVANTAGES OF CMMG MK57

In the event the bolt provider moves ahead, the bolt rotates and locks the lugs before the supporting lug abutments. In the event the team moves rearward, the cam pin forces the bolt to rotate and unlock through the barrel extension.Both ProMags I used worked flawlessly, as well as the factory 5-7 mag I'd didn't. I’ll acknowledge my general encou