Mother Jones did a story on this a while ago, and I was under the impression that if you had a drill press it would be enough to get an 80% receiver usable.

Either way, I'm glad Defense Distributed is moving the ball forward on this issue.

Edit to add: This company makes plastic ones that a drill, chisel, and Dremel are enough to finish, no CNC machine necessary. http://www.ammoland.com/2014/02/ep80-ar15-rifle-lower-at-hom...