Below is Pic of some Rivet Tool plans. I've not personally built this design but it looks similar to the plinker rivet jig.
Interesting design.
This page contains some diagrams of tools for building the AK-47. There are more AK-47 pics and info on the following pages. AK-47 Receiver bend instructions, and coming soon AK-47 parts kit building!! How to build with bolts or screws and how to rivet an AK-47 the easy way!! How to fold a AK-47 receiver flat with no bending jig required!! and much more!!