This legislation, known as the 3D Printed Gun Safety Act of 2025, amends chapter 44 of title 18, United States Code, to address the proliferation of 3D-printed firearms. It specifically makes it unlawful to intentionally distribute digital instructions , such as Computer Aided Design files, over the internet or World Wide Web that can automatically program a 3D printer to produce a firearm or complete an unfinished frame or receiver. This measure aims to prevent the creation of untraceable and potentially undetectable firearms by unlicensed individuals. The bill's findings highlight concerns that 3D printing enables individuals to create weapons that evade detection by metal detectors and lack serial numbers, hindering law enforcement's ability to trace firearms used in crimes. This increases the risk that dangerous people, including felons and domestic abusers, could obtain firearms outside of legal channels. By regulating the online distribution of these schematics, Congress seeks to curb the dangerous effects of untraceable and potentially undetectable firearms, thereby enhancing public safety and national security.