Polymer80 Lawsuits and Legal Timeline

Last updated 24 October 2026. This page lists reported events. It is not legal advice and it does not say who was right in any case.

The short answer

From 2019 until it closed in 2024, Polymer80 faced suits from cities and injured people, new state laws on unfinished receivers, and a federal rule change. Wikipedia says the company ceased operations in July 2024 because of the cost of defending itself in court. Wikipedia also notes that parts of its article rely on primary sources, so treat single details as reported.

Reported events

Date	Event
June 2019	The Attorney General of the District of Columbia sued over advertising and sales in D.C.
10 Dec 2020	ATF agents searched the company's headquarters in Dayton, Nevada.
Feb 2021	The Los Angeles City Attorney and Everytown Law sued the company.
May 2021	Nevada passed AB 286, which banned sales of privately made firearms and receiver blanks. Reports say state courts struck down key parts in December 2021.
1 Jun 2022	Baltimore sued. The same day a Maryland law treating unfinished receivers as firearms took effect.
24 Aug 2022	The federal "frame or receiver" rule took effect (ATF).
5 Jul 2023	Philadelphia sued Polymer80 and another receiver-blank supplier.
25 Jul 2024	Listed as defunct after bankruptcy from legal costs.

Where the federal rule stands

The Supreme Court upheld the rule against a facial challenge on 26 March 2025. For the later court fight, read our explainer on the frame or receiver rule.