INDICATORS ON COLT 10.5 UPPER YOU SHOULD KNOW

The top of the bolt carrier teams. The best would be the typical five.56mm bolt carrier team. Observe the bolt, cam pin as well as the carrier critical. On the bottom is definitely the 9mm SMG bolt group.The best part is, You should use 9mm Publications on your own pistol by acquiring a 9mm conversion kit so that you can change it to an AR-15 lesse