I have a Angstadt Arms https://angstadtarms.com/product/1045-receiver-set-for-glock/ .45 ACP upper and lower set that has been sitting in the safe for about 2 years. I finally decided I want to go ahead and build this out. Unfortunately Angstadt Arms is no longer making the .45 ACP barrels or uppers for these. I have been looking online for a barrel around 10.5" - 12.5". I plan on calling them tomorrow to see if they have any recommendations as to who or where I can get a barrel from. In the meantime are there any vendors or companies that anyone would recommend? Looking online I found a company https://www.joeboboutfitters.com/Ne...-12-5-Match-Grade-45ACP-p/nfa-bbl-45mg-12.htm but don't know anything about them or the barrel. I will probably stay with the Angstadt Arms handguard unless a better option is suggested. The lower is being Form 1 right now just waiting on the paperwork to clear. I don't trust the ATFE and what they will do down the road regarding pistol braces. The gun is being built as a plinker, hog hunter, and home defense. It will run a Griffin Armament Bushwhacker 46 unless I decide on a dedicated .45 pistol can at a later time. I may eventually purchase a 16" barrel for shits and giggles.