California Sues Polymaker Over 3D Printing Filament and Ghost Guns
San Diego County Counsel filed a civil complaint on October 5, 2026, alleging Polymaker marketed filament as a firearm precursor part under California law.
San Diego County Counsel filed a civil lawsuit on behalf of the People of the State of California against Polymaker LLC on October 5, 2026, according to Tom's Hardware. The complaint was filed in San Diego County Superior Court.
The lawsuit alleges that Polymaker marketed its 3D printing filament to appeal to gun enthusiasts, transforming PLA into a regulated firearm precursor part. California law defines a firearm precursor part to include any article marketed or sold to become the frame or receiver of a functional firearm once completed.
The complaint seeks disgorgement of profits, civil penalties, and injunctive relief.
The filing references Sean Aranda, known as The 3D Print General, 65 times. Polymaker hired Aranda as Head of Customer Experience, where he fostered the company's online community, and he is now a Senior Technical Account Manager.
In 2023, Aranda was banned from YouTube over firearm policy violations; his channel had 123,000 subscribers at that time. Before hiring him, Polymaker had sponsored his channel with a special edition creator spool of khaki colored PLA Pro, according to the background of the case.
The lawsuit is presented by San Diego County's new Consumer Fairness and Public Protection Division.
Quick answers
Who is being sued by California over 3D printing filament?
Polymaker LLC is named in a civil lawsuit filed on October 5, 2026, by San Diego County Counsel on behalf of the People of the State of California.
What does California allege about Polymaker's filament?
The complaint alleges Polymaker marketed its filament to appeal to gun enthusiasts, transforming PLA into a regulated firearm precursor part.
What is California seeking in the Polymaker lawsuit?
The lawsuit seeks disgorgement of profits, civil penalties, and injunctive relief.