27 States Challenge AR-15 Bans

Twenty-seven states just told the Supreme Court that banning AR-15s is unconstitutional, period.

State of play: Tennessee and Kansas led a coalition of 27 states filing an amicus brief urging the justices to strike down Illinois' and Connecticut's bans on AR-15s and similar semiautomatic rifles. The brief argues these laws outlaw rifles owned lawfully by tens of millions of Americans, putting the states on a collision course with the Second Amendment's plain text and history.

The legal question: Both bans target firearms the states' own briefs describe as "in common use" for lawful purposes—self-defense, hunting, and competition. That phrase isn't accidental. It's the standard the Supreme Court set in District of Columbia v. Heller and reinforced in Bruen: weapons in common use by law-abiding citizens can't be banned outright, no matter how lawmakers feel about their appearance or capacity.

Illinois and Connecticut have defended their bans by pointing to features like pistol grips, adjustable stocks, and detachable magazines as markers of a supposedly more dangerous class of weapon. The 27-state brief pushes back hard on that framing, arguing that cosmetic and ergonomic features don't change a rifle's function—and that popularity alone, not political labeling, is what the Constitution cares about.

Between the lines: This isn't just a two-state fight. Similar AR-15 bans exist in California, New York, New Jersey, Maryland, Massachusetts, and Washington D.C. A ruling against Illinois and Connecticut would put every one of those laws on shaky legal ground, which is exactly why 27 states—far more than just the two directly involved—decided to weigh in now.

What to watch: The Supreme Court hasn't yet said whether it will actually hear the case on the merits or how it will frame the question presented. If cert is granted, expect a decision that could either cement AR-15s as protected "common use" arms nationwide or hand blue states a green light to expand bans further.

The bottom line: With 27 states on record and millions of AR-15 owners watching, this brief signals the fight over America's most popular rifle is heading toward a nationwide resolution—not another patchwork of state-by-state rulings.