I found this a very interesting find. The Supreme Court's per curiam opinion does not explicitly state that stun guns are protected by the Second Amendment. It merely rejected the SJC's rational for determining that they were not. HOWEVER, information on this state website, compiled by the Massachusetts State Trial Court Law Libraries has come to the conclusion that stun guns ARE protected by the Second Amendment.
Massachusetts Law about Guns and Other Weapons
Given that this is on an official judicial branch website, I wonder if this is sufficient to estop any prosecutions?????
Massachusetts Law about Guns and Other Weapons
Selected Case Law
Caetano v. Massachusetts links to PDF file , 577 US __ (2016).
A stun gun is protected by the Second Amendment.
Given that this is on an official judicial branch website, I wonder if this is sufficient to estop any prosecutions?????