Here's something I'd like show you all that are interested in pistol caliber ARs. An AR in .45 acp was something I've wanted for quite a while now. There weren't many kits out there to choose from and the ones that were around were expensive and had some functionality issues. Then I found out about Macon Armory and ordered a kit.
I opted for the blowback operated kit w/ 5.5" barrel and planned on building it into a pistol. Later, I'll SBR it. Their kit came with a complete upper with keymod rail, magazine adapter block, heavy buffer (10 ounce!), two 20 rd magazines, and a mag loader. Macon Armory fabricates their own mags, which I'm not too crazy about (proprietary) but they're beefy and work perfectly.
So it functions flawlessly. It's not as quiet with my suppressor (AAC TiRant45) as I'd like it to be due to the blowback action...the bolt closing, nay clacking, after it fires is the loudest part.http://i5.photobucket.com/albums/y16...29cd0e7a30.jpg
http://i5.photobucket.com/albums/y16...zzio/ar45a.jpg
http://i5.photobucket.com/albums/y16...zzio/ar45b.jpg