More practically, it depends on which style receiver you have. Underfolder, sidefolder, standard AKM, etc. For the front trunnion rivets the modified boltcutter squeezers work well and will only cost you a cheap pair of BCs ($10-15) and some grinder time. Member HcPookie designed them and there should be plans in the Library here. He also has his website address in his sig line with directions on making them.
For the triggerguard rivets, all you need is a vise and a hammer and punch. Close the vise jaws on the TG so the rivet flange is laying on top the jaws and spot the rivet holes on the jaws with a centerpunch. Remove the TG and drill four divots in the jaws with a drill sized to the rivet heads. You want them all the same depth and deep enough that only the slightest part of the rivet head sticks above the surface. Place the rivets in the TG and replace the TG in the vise with the heads in the divots. Add the selector stop plate and then the receiver. Use the punch to flatten the rivets. The punch may need clearances ground in it to clear the rails and center support. The rear TG rivet can be done with another divot drilled near the edge of the jaws. You can flip the jaws over and the divots will be out of sight and protected for the next job.
Full length (goes all the way through from one side to the other) rear trunnion rivets can be done with a scrap steel backing plate and a hammer and punch. Divots are drilled on the plate for the pre-formed heads and the punch forms the heads that set the rivets. A divot drilled in the end of a punch forms a rounded head. You can also use two dimpled plates squeezed in a vice to form the heads. For the shorter rivets that only go through one side on the folders the BC squeezers often work fine, others are so far in you need to come up with more complicated tools.
Check out the library here, lots of alternatives.
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basic rivet tools
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