The Massachusetts Supreme Judicial Court held, opens new tab that a 1957 law barring people from possessing spring-release pocketknives commonly known as “switchblades” violated the right to keep and bear arms enshrined in the U.S. Constitution’s Second Amendment.

The court reached that conclusion while dismissing a charge filed against David Canjura for unlawfully possessing a switchblade, which Boston police found when responding to a report of an altercation between Canjura and his girlfriend.