I understand the intent, but feel that there are so many other loopholes that put much worse weapons on the street than a printer. Besides, my prints can barely sustain normal use, much less a bullet being fired from them. I would think that this is more of a risk to the person holding the gun than who it’s pointing at.
Usually part of 3D printed guns aren’t 3d printed. I’d bet you could make a one-time-use gun out of cheese, but the firing pin and springs would probably have to be made of something else to use a traditional round.
If you go with a gunpowder charge ignited with a flame, it’d be much easier. I’m sure there’s even a cheese that could sustain a flame to ignite it with too. You could even make a cheese bullet.
The future of warfare: dairy.