Probably won't do this again...lots of time and tinkering. Reconstructed a milled reciever from scratch using a piece of 1"x2" tubing. ($5.00 at the steel shop) Planed one short side of the tubing to approach the beginnings of the top rails, then split the tubing length ways. Cut the opposite end not planed which left just enough for the side walls. The 1/8th tubing comes close to the original, but it left the interior deminsions tight, but OK. The good news is ITS DONE and IT SHOOTS GREAT! Matched up 4 different torch cuts. C-clamped angle iron for straight edge to keep the top rail straight. "Truth time #1" shows how far off I was getting the bolt carrier into the gas tube. "Truth stretched" shows heating on one side to align bolt carrier with my 285 lbs pushing (three times) in a vise with one hand and oxy-acy torch in the other til it all lined up. Didn't bust any welds either. Plenty of chances to fail on this one, my 4th build. Had to cope with the process as it presented itself. Even tho over 1/2 of the reciever area is Idaho made, probably won't count as a compliance part unless there is a "round-up" rule to the next whole digit of one part. Tools... a Lincoln Mig, bench grinder, 4.5 inch hand grinder, dremil and drill press, ...lots of files.