In fact you can buy a desktop CNC milling machine and all of the files on a USB drive to finish 80% receivers.

This development certainly gives the civilian populace more teeth against a would be despotic government.

assuming they could get bullets and all the other parts needed to make guns, we can in the US but that is only because we don't currently have a despot in charge.

It was already fairly easy to finish 80% receivers and make black pipe shotguns and I assume that this will be just as popular as that. You can also make an AK receiver by printing out a template that you glue on an appropriate piece of square stock and then drill out with a drill press.