Mass. Gen. Laws ch. 140, § 131J

Sections 1313/4, 131K and 131P shall not apply to stun guns. The secretary of public safety and security shall promulgate regulations restricting access or use of stun guns by non-licensed persons and establishing minimum safety and quality standards, safe storage requirements, education and safety training requirements and law enforcement training on the appropriate use of stun guns, which shall require that any stun gun purchased or used by a law enforcement or public safety official include a mechanism for tracking the number of times the stun gun has been fired.