I found a website that showed how to complete an 80% lower with nothing more then a drill press. All the hard machining has already been done. Your press would need a bed of some sort to hold it and you'd need a way to set it up. We're talking movements of .001" or less.
If the pain is lacking so is the discipline...
"the only 911 call I need is chambering a round" - Mr. Muller, MO car dealer