3D Printers Have "fingerprints", And To Trace Guns They Make Will Require Registering Them
Chip Saunders"For this to be useful to law enforcement who would be tracing guns, you'd have to have a record of the unique signature of every 3D printer being sold,"
Few people know that laser printers have a DNA/fingerprint placed by the manufacturer. Here's how you can find it on your printer. Print a blank sheet of paper. Look very closely using a magnifying class. You'll find very light yellow dots on the page. That's your printer's DNA/fingerprint. I suppose 3D printer manufacturers could have done similar.