The new case, focused on young adult firearms rights, is the latest piece of a broad effort targeting the new restrictions and reforms.

Law-abiding 18-to-20-year-old citizens of the Commonwealth,” the groups told the court, “have an enumerated right to keep and bear common firearms for defense of self and family and for other

A coalition of industry groups including the National Rifle Association and Massachusetts gun owners on Friday sued over firearm age restrictions included in the wide-reaching package Gov. Maura Healey signed in July.