A major ruling in favor of the legal ownership and carry of Stun Guns came from the Supreme Court in March of 2016 in Commonwealth v. Caetano.
Massachusetts had a total ban on Stun Guns. A citizen could not even own one and keep it in the privacy of their home. The Massachusetts State Supreme Court held that the Second Amendment did not protect the rights of citizens to own Stun Guns, and that the law banning them was within the state’s rightful actions.
In a 8-0 ruling the Supreme Court ruled the Massachusetts Supreme Court errored on the matter of the Second Amendment protecting Stun Guns under the definition of “arms” and sent the case back to the Court to be reconsidered.
The Court has held that “the Second Amendment extends, prima facie, to all instruments that constitute bearable arms, even those that were not in existence at the time of the founding,” and that this “Second Amendment right is fully applicable to the States.”
If you are in a state that has strong restrictions against Stun Guns you might want to contact your state representative and make them aware of this ruling.