From Guns.com:

First filed in 2021, the $10 billion suit – supported by no less than a dozen anti-gun states such as Massachusetts, Connecticut, and Illinois – sought to put some of the biggest names in the American gun industry including Barrett, Beretta, Century Arms, Colt, Glock, Ruger, and Smith & Wesson on the hook for the out-of-control narco cartel violence that has plagued Mexico since 2006. 

A federal judge tossed the suit in October 2022, citing the Protection of Lawful Commerce in Arms Act prevented the claim, but Mexico pushed the issue and appealed to the Massachusetts-based U.S. First Circuit Court, which kept the case alive and handed the issue to a lower court in Boston.