Posted by Yukon58 on 1st Might 2023 I made a decision to go with this particular 16” upper for my Colt lower after the fiasco Together with the atf pistol brace ruling. I wasn’t gonna fluff all around so I went all Colt and am happy I did.It can be an ordinary FSB and no I'd no challenges sighting it in. I originally built it which has… Read More