WASHINGTON >> The Supreme Court is ordering Massachusetts' top court to look again at the state's ban on stun guns.

The justices on Monday revived an appeal from a woman who said she kept a stun gun in her purse for self-defense against an abusive former boyfriend.

The Massachusetts Supreme Judicial Court said the ban on possession of stun guns does not violate the Second Amendment.

Monday's unsigned opinion does not go so far as to strike down the law or say stun guns are protected under the amendment's "right to keep and bear arms." But the opinion said the Massachusetts court's reasoning for upholding the law was faulty.