Posted by Yukon58 on 1st Might 2023 I chose to go using this sixteen” upper for my Colt decrease once the fiasco With all the atf pistol brace ruling. I wasn’t planning to fluff around so I went all Colt and am glad I did. Posted by Phil Herbert on https://colt-9mm-upper30639.theideasblog.com/27185278/the-greatest-guide-to-colt-smg-upper