Ok. I didn't get to any part about "epoxy"!!! LOL!

That's seriously crazy. I just skimmed the first page and thought I would read it later. But posted it as I hadn't seen it before.
And ya, it is a testament to how loose you can build these and still have them fire. He obviously did this a long time ago. And used the hammer and flat iron out of necessity. I'll read thru the rest later.
You know there are guys out there that could build a receiver from scratch with a hammer, a hand drill and some crap found in a junkyard though. I'm impressed by those guys. I watch some of these sheet metal guys on TV and am blown away with there craftsmanship. Anyone can use a press and jig. I'd like to meet that guy in the Khyber Pass with the ball peen hammer and the punch set. And the gold tooth he did himself. lol!
But still that doesn't replace safety if you have access to it. Come on. Epoxy?! I've gotta go read all the way thru that nuts build.