Can we stop saying 3D guns are "untraceble?"

[Kentonio]

17. Hmmm not really

The only link you have between the gun and the person who made it, is if you already have the person's identity and can check their internet/sales records. The only other option you'd have is to try and trace everyone who downloaded that particular gun print from the internet, which could be hundreds of thousands of people and then try and check if any of those people had also purchased a 3d printer (which you'd expect most of them would have, because otherwise why would they be downloading 3d print schematics?). Then what? Do you forensically examine every one of those 3d printers to see if it matches the print quality of the gun that was used to commit a crime?

Oh and of course if the person who downloaded it did so from a random computer and just saved the print schematic to a thumb drive, then you don't even have that chain to follow.