California Sues PLASTIC: San Diego's Absurd Lawsuit Against 3D Filament Maker

California's at it again. San Diego County just filed a lawsuit against Polymaker LLC, a 3D-printer filament manufacturer based in Texas, because their plastic filament might be used to print gun parts.

The county's argument boils down to this: Polymaker sells filament that's strong enough for 3D-printed gun frames, and some gun-printing YouTubers have used their products. Therefore, the company is somehow responsible for how criminals use their product.

This is the kind of lawsuit that makes my head spin. Under California law, a "firearm precursor part" is anything "marketed or sold to the public to become or be used as the frame or receiver of a functional firearm." Now California wants to stretch that definition to cover raw plastic.

The case leans heavily on a May 2026 incident where San Diego police arrested a 16-year-old with a 3D-printed gun and—here's the smoking gun—some Polymaker filament. They want to paint that connection as causation.

The lawsuit invokes California's unfair competition law, a 2026 "facilitation" statute targeting 3D gun printing, and the state's industry-conduct statute that essentially forces companies to prevent any potential unlawful use of their products. They're asking for disgorgement of revenue, civil penalties up to $2,500 per violation, and injunctions.

Let's be clear about what's happening here. This lawsuit is part of a broader campaign to demonize and restrict access to tools and information related to legal firearm manufacturing. Building your own firearms for personal use is a right protected by the Second Amendment, and regulating plastic because it could theoretically be used to make a gun is a gross overreach.

This sets a terrifying precedent. If filament manufacturers can be sued for how customers use their products, where does it end? This is the same logic that would sue hardware stores for selling pipes that could be used in illegal weapons.

The real target here isn't just Polymaker—it's the entire concept of private firearm manufacturing. And if this precedent holds, it won't stop at California borders.