DETAILS, FICTION AND COLT SMG UPPER RECEIVER

The highest on the bolt carrier groups. The best is the standard 5.56mm bolt carrier team. Detect the bolt, cam pin plus the provider important. On The underside may be the 9mm SMG bolt group.The modified shut variety aperture (fifty meters) with the Colt 9mm SMG is engaged. Here is the standard aperture with the SMG but an extended vary aperture i