I would just grab an 80% and do the milling it's easier and a solid piece of metal will always be stronger than welded together metal pieces. I mean I used to be a welder myself and I still wouldn't feel comfortable doing that i believe
+1 I wouldn't do it, either. I'm also a TIG welder. And I certainly wouldn't use a MIG welder. Not the right tool, IMHO. And, if I read the description right, it says you still have to tap the buffer tube hole. I hear that is a very expensive tap. Many reasons not to do it. I'm not technically a machinist, but I would feel way more comfortable doing an 80% on a bridgeport. I wouldn't even bother with a drill press.
I don't see what the problem is. Everybody is being nice, and getting along, and I, for one, am learning stuff. So, if you don't like the discussion, don't look at the thread. Or, simply cut to the chase, and close it.
Is there an age limit for a thread, after which we kill it?