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.
It’s all CNC. All the way down. Always was.
Seriously, 3d printers are just CNC machines, they use the same code the mill I use that was built in 1989 uses.
Yes, they added some new g codes for the extruder bit (even that is just used as an axis), but otherwise you could hand code a 3d print. Probably not a good idea, but could be done. CNC is cool