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California Sues Major 3D-Printing Filament Maker over Claims It Deliberately Catered to Ghost Gun Enthusiasts

The county says the company markets filament for untraceable firearms as California officials intensify lawsuits against ghost gun suppliers.

Summary by Tech Spot
The complaint, which was filed on October 5 in San Diego County Superior Court, acknowledges that 3D printing filament is not illegal. However, it alleges that Polymaker intentionally marketed its product toward ghost gun aficionados so they could turn its filament into a regulated "firearm precursor part."Read Entire Article

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The US court is bringing an unprecedented lawsuit against Polymaker, a giant of polymer coils. The prosecution now considers that the mere plastic filament PLA, if skilfully marketed, constitutes a "firearm precursor part" (a component of a firearm). This complex legal offensive aims to stifle the material proliferation of weapons undetectable directly at the source.

San Diego County has sued Polymaker for how he sells his PLA filament. And basically the debate that never goes out comes back: the ghost weapons printed in 3D. What exactly has happened The lawsuit was filed on October 5, 2026 before the County Superior Court, on behalf of the California People. The San Diego County Attorney signs through its Consumer Equity and Public Protection Division. Polymaker is a company based in Shanghai and operating …

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Los Angeles Times broke the news in El Segundo, United States on Saturday, October 10, 2026.
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