Ghost Guns and Untraceable Firearms Act of 2023

This bill regulates "ghost guns" (unserialized firearms assembled from kits or parts) by requiring all firearms to have unique serial numbers for traceability. It makes it unlawful for unlicensed individuals to manufacture, sell, transfer, or possess ghost guns in interstate commerce, with limited exceptions for licensed dealers during a one-year transition period. The law defines ghost guns as firearms lacking a serial number from a licensed manufacturer and prohibits unlicensed people from engraving serial numbers or using machines to manufacture firearms. It directly affects individuals building or possessing untraceable firearms, including those using 3D-printed parts or unfinished frames. The bill aims to improve law enforcement's ability to track firearms used in crimes, referencing that 27.4% of traced firearms in 2021 were recovered across state lines.