School me on 45 ACP AR Platforms

[PJD642]

Funny you posted this, I was just looking yesterday & couldn't find a thread either. I just ordered a Faxon 10" .45 barrel and aluminum Streamline handguards, with the eventual aim of adding a suppressor & having it pinned/welded and using it with my Cav Arms/Sabre Defense poly lower. I'm conflicted as to whether I should stick with the Hahn buffer & grease gun mag well insert I've got already, or swap the insert for a Glock model. (Side note, I wish magpul made .45 glock mags).

My concerns are which bolt/BCG will work best with my setup. There's a decent number of them out there to choose from, and all the reviews say each one is the best so that's no help. Back when (2006?) there was a guy on tacticalunderground.us who worked for Cav Arms, had a suppressed .45 upper on one of their lowers and was more than happy to discuss it. I wish he was still around, or I could find someone who has experience with these things nowadays.

Macon Armory apparently makes a DI upper. Everything else is blowback.

There's a couple threads on ar15.com, but I haven't had a day off to look at them all yet and see if there's anything worthwhile.

ETA: I'm gonna have to go with a glock magwell insert. Silly me forgot the need for an ejector, which is built in to the Oly upper. Trying to use greasegun mags without the Oly upper won't work...sigh.