Date saved: 2026-10-20 03:00 (PDT)
Sources: Washington State Legislature, PCMag, California AG, PC Magazine Opinion
Key findings
Washington State HB 2320, landmark upstream regulation
- Washington State Legislature (March 2026): House Bill 2320, signed into law, prohibits anyone from manufacturing a machine gun, bump-fire stock, undetectable firearm, short-barreled shotgun, or short-barreled rifle (including by use of a 3D printer or CNC milling machine), or any part designed solely for converting a weapon into such a firearm. It also prohibits knowingly or recklessly manufacturing a frame or receiver (or unfinished frame/receiver) via 3D printer or CNC unless the person is a federally licensed firearms manufacturer. Critically, the law bans selling, transferring, or distributing "digital firearm manufacturing code", defined as any CAD files or digital instructions that may be used to program a 3D printer or CNC machine to manufacture a firearm, frame, receiver, magazine, or unlawful firearm part, to anyone not federally licensed. Possession of such code with intent to distribute or manufacture is also criminalized. (Source)
California, liability expansion and content-filter mandates
- California Attorney General (2025): Assembly Bill 1263, effective January 1, 2026, updates the definition of "digital firearm manufacturing code" to include any CAD/CAM files or digital instructions that may be used to program a CNC milling machine, 3D printer, or similar machine to manufacture firearms or precursor parts. The law expands civil liability for those who knowingly distribute such code to unlicensed persons. Additionally, proposed Assembly Bill 2047 would require 3D printers sold in California to incorporate technology to detect and block the production of firearm components, uploaded design files would be scrutinized by AI programs with human oversight. (Source)
- PCMag (2026): California's AB 2047 represents a mandate for printers to actively scan and block certain designs, a content-filter approach to hardware regulation. If passed, this would make California the second state after New York to require such blocking technology. (Source)
New York and Colorado, first-of-their-kind laws
- PCMag (2026): New York signed a first-of-its-kind law in May requiring 3D printer blocking technology for firearm components. Uploaded parts files will be reviewed by AI programs with an additional layer of human intervention. Colorado's HB26-1144, signed into law and awaiting governor approval at time of reporting, takes a more direct route by criminalizing the manufacture of certain firearms and parts using 3D printing. (Source)
- PCMag (2026): In both California and New York, legislators are considering proposals that would require printers to recognize and reject weapon components, a trend that could spread to other states. The Washington State law is notable because it reached upstream into the digital ecosystem, regulating files and explicitly including both 3D printers and CNC machines within the legal framework. (Source)
Broader implications for digital manufacturing
- PCMag Opinion (2026): The ghost gun crackdown is "quietly threatening the future of 3D printing" by regulating not just guns but the digital files and manufacturing hardware that make them possible. The Washington State law's definition of "digital firearm manufacturing code" (any CAD files or instructions that may be used to program a 3D printer or CNC to manufacture a firearm) could be interpreted broadly, raising concerns about chilling effects on legitimate digital manufacturing, prototyping, and hobbyist use of 3D printers and CNC mills. (Source)