A major opening brief has just been filed with the U.S. Supreme Court in Viramontes v. Cook County and Grant v. Higgins. Petitioners argue that AR-15 platform and similar semiautomatic rifles are constitutionally protected arms—and new data showing roughly 26 million American owners could be devastating to the argument that these rifles are somehow “unusual.” Here’s what the brief actually says and why this case could reshape gun bans nationwide.


