The Replica Prop Forum

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Thursday, October 8, 2026

San Diego Sues Polymaker, Claims 3D-Printer Filament Is a Firearm Precursor Part - Ammoland.com

The People of the State of California, acting through Damon M. Brown, County Counsel for the County of San Diego, have sued 3D-printer filament maker Polymaker LLC. The complaint, dated October 5, 2026, and filed in San Diego Superior Court, treats selected Polymaker plastics as “firearm precursor parts.” According to the complaint, the company allegedly markets them to become the frame or receiver of a working gun. Those guns are what the filing calls “ghost guns”: unserialized firearms made outside the licensed manufacturing system.

Giffords Law Center to Prevent Gun Violence is on the pleadings, along with White & Case LLP. Giffords is co-counsel, not the plaintiff. The named defendant is Polymaker LLC, a Delaware company with its principal place of business in Missouri City, Texas, plus 50 unnamed Does. The single cause of action is California’s Unfair Competition Law, Business and Professions Code § 17200, brought under the unlawful and unfair prongs. The complaint says it is not an attempt to ban filament in California, and it concedes that 3D-printing plastic has lawful uses.

Click the link to read the whole article:  San Diego Sues Printer Filament Is a Firearm Precursor Part

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