Posted by Yukon58 on 1st May 2023 I made a decision to go using this type of sixteen” upper for my Colt decrease once the fiasco Along with the atf pistol brace ruling. I wasn’t about to fluff all-around so I went all Colt and am glad I did.The Colt SMG fires from the shut bolt, is provided by using a collapsible buttstock, and is easily field