Welcome to Law.com Class Actions: Critical Mass, a weekly briefing for class action and mass tort attorneys. 

This week: Law firms target gun manufacturers over mass shootings in Highland Park, Illinois, and Uvalde, Texas. Lawyers suing over recalled heartburn drug Zantac have split on legal strategies, with thousands of lawsuits landing in state courts across the country. Find out who’s spearheading antitrust lawsuits brought by publishers and the states against Google.