The U.S. Supreme Court has unanimously rejected Mexico’s effort to hold American gun manufacturers liable for cartel violence, shutting down a closely watched suit that sought roughly $10 billion in damages. The decision is a significant win for the firearms industry and a forceful reaffirmation of the Protection of Lawful Commerce in Arms Act, or PLCAA, the federal statute that broadly shields gunmakers and sellers from many civil claims arising from criminal misuse of their products.

Mexico had argued that U.S. manufacturers and distributors knowingly facilitated illegal trafficking by designing, marketing, and distributing firearms in ways that predictably supplied cartel networks.