All the ‘miscreants, criminals and governments’ would need is a laptop, a 3D printer, a milling machine, and suitable software to fabricate virtually ANY firearm their hearts desire......progressive laws or no. We are in the 21st century, the high tech age, don’t ya know. Idiots.
Not even THAT equipment is required: just a couple of pipes, connectors, nails and shells.
One HELL of a slam ‘pop-gun’