GoKawiilNewsom signs law requiring future 3D printers to block gun-file printing in California
California Governor Gavin Newsom has signed legislation requiring 3D printer makers to build in firearm-blocking technology once ASTM International finalizes an industry standard for such detection. The law only applies to printers sold after a standard exists, leaving current devices unaffected, and California becomes the second state after New York to pass such a rule, with Colorado and Washington considering similar bills. The California DOJ must check quarterly for a published standard from mid-2027 through mid-2029, after which it is no longer obligated to keep checking.
GoKawiil's interpretation of the reporting above, not reported fact.
The law's effect hinges entirely on whether ASTM International ever finalizes a workable standard, meaning the regulation could remain dormant for years or never take effect if no technical consensus emerges. Because detection methods—matching known gun files or using trained models—are described as easily circumvented, any eventual standard may face technical and enforcement challenges. This could set a template other states follow, but it also highlights tension between regulating consumer hardware and the practical limits of software-based firearm detection.
- California now requires new 3D printers to include firearm-blocking tech, but only once ASTM sets an industry standard.
- Existing printers are exempt, and the law regulates sale/transfer, not ownership or use.
- Detection methods for 3D-printed gun files are currently imperfect and can reportedly be bypassed by simple file modifications.
Source: tomshardware.com — Jowi Morales, 2026-10-02
Published there as: “California bill requiring 3D printers to block firearm printing becomes law”
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