I use modified bolt cutters.
I don't have a camera anymore so I found a site where someone made a tutorial: http://pookieweb.dyndns.org:61129/AK...tershaping.htm
Looks like the same cutters as mine only I shaped my blades differently. One side was ground flat, then a round recess was drilled in it for the rivet head. The other was ground flat to the depth required for the finished rivet size. Perfect buck every time. It's the only riveting job I use it for so it's not adjustable like his. I probably would have made it like his design if I had found his tutorial before I made mine.
Beats paying $150-250+ for some aviation rivet squeezers, unless you like expensive tools.