I squirted out a few copies of his AR9 and what I did was get the templates for the metal parts at https://github.com/japan44/Files and then converted the svg to dxf (instructions: https://www.youtube.com/watch?v=9Uq3yGDqEFM&list=WL&index=18&pp=gAQBiAQB ) then go to sendcutsend (SCS) and upload (dxf) they will cut the pieces to you. after that I used some jigs I think this is what you need https://github.com/japan44/Rail-Press-Jigs-and-templates ... stuffed them in a table vice and went nuts. looking up my order, I had some pieces that were .1" and others that were .048
hope that helps?