The only reason not to put the trunion holes is when the flat is bent they could possibly not line up if the bend isn't just right. I have 100 flats here from Tapco, but I don't want to bend too many just trying to figure out if it's perfect.
The dimensions were taken from a trunion and what was left of the sheet metal receiver. I put the trunion in my mill vise and used the digital readout to map out the dimensions to each hole from a specified point. Then I took an existing cad file that shows the whole flat and drew the holes in. The only problem was that the angle wasn't there for the holes so after printing out a bunch of transparant sheets to match up until I finally got close enough to make one flat. I need to tweak the four folder catch holes, but other than that it fit just fine.
It would be nice if there was somebody in the Kansas City area that needed one or two of these made up so I could practice without making more receivers than I will ever need for myself. Right now there are three or four receivers sitting on my bench that I probably won't use that are all bent up and ready.
When I took the underfolder apart I took pictures of each step so it would make a good guide on how to do it. When and if I get some time I'll make it up and post it on my website.
www.ak-builder.com
The dimensions were taken from a trunion and what was left of the sheet metal receiver. I put the trunion in my mill vise and used the digital readout to map out the dimensions to each hole from a specified point. Then I took an existing cad file that shows the whole flat and drew the holes in. The only problem was that the angle wasn't there for the holes so after printing out a bunch of transparant sheets to match up until I finally got close enough to make one flat. I need to tweak the four folder catch holes, but other than that it fit just fine.
It would be nice if there was somebody in the Kansas City area that needed one or two of these made up so I could practice without making more receivers than I will ever need for myself. Right now there are three or four receivers sitting on my bench that I probably won't use that are all bent up and ready.
When I took the underfolder apart I took pictures of each step so it would make a good guide on how to do it. When and if I get some time I'll make it up and post it on my website.
www.ak-builder.com
