COLT SMG UPPER RECEIVER THINGS TO KNOW BEFORE YOU BUY

The highest in the bolt provider teams. The best would be the typical 5.56mm bolt provider team. See the bolt, cam pin plus the carrier important. On the bottom will be the 9mm SMG bolt group. I have not selected a flat top or A1 (with no FA and deflector).  I'm thinking a 16" flattop, as well as a 10.5" with have take care of like yours.  I've