5 TIPS ABOUT CMMG MK57 YOU CAN USE TODAY

Once the bolt carrier moves ahead, the bolt rotates and locks the lugs in front of the supporting lug abutments. In the event the group moves rearward, the cam pin forces the bolt to rotate and unlock through the barrel extension.The two ProMags I utilized worked flawlessly, along with the factory Five-7 mag I'd didn't. I’ll admit my general prac