COLT SMG UPPER RECEIVER FOR DUMMIES

Posted by Yukon58 on 1st May 2023 I chose to go with this 16” upper for my Colt reduced after the fiasco With all the atf pistol brace ruling. I wasn’t gonna fluff all-around so I went all Colt and am glad I did.It can be an ordinary FSB and no I had no issues sighting it in. I originally constructed it using a DPMS A2 upper receiver just befor