Posted by Yukon58 on 1st Might 2023 I decided to go with this 16” upper for my Colt lessen following the fiasco While using the atf pistol brace ruling. I wasn’t planning to fluff all over so I went all Colt and am happy I did. 56 bullet weights, along https://coltsmgupper78740.thelateblog.com/27216880/the-basic-principles-of-colt-smg-upper-receiver