Polymaker

California has filed a lawsuit against 3D printing filament maker Polymaker, accusing the company of promoting the production of untraceable 3D-printed firearms, often called ghost guns. The suit marks one of the most prominent legal actions against a materials supplier in the debate over printable weapons, and it is drawing attention to how manufacturers may be held responsible for how their products are used.

The state of California has filed a lawsuit against 3D printer filament company Polymaker, accusing it of promoting untraceable ghost guns by marketing its products to the 3D-printed firearm community. The case is being brought by the state's newly formed Consumer Fairness and Public Protection Division, which is also pursuing separate actions against gaming platform Roblox and advertising firm AppLovin.