Posted by Yukon58 on 1st May well 2023 I chose to go with this sixteen” upper for my Colt lower once the fiasco With all the atf pistol brace ruling. I wasn’t going to fluff around so I went all Colt and am glad I did.Present-day output is the AR6450 of Colt’s Regulation Enforcement Only line of weapons. This Model works by using common mil-s