Stun Gun Laws by State: A Comprehensive Guide for 2022 Legal Timeline of Stun Gun Repeals. 2021: Hawaii passes House Bill 891, overturning their state stun gun ban. New law becomes effective as of January 1st, 2022. Until then, stun guns and TASERs are still illegal. Lawmakers in Michigan are still attempting to make regular stun guns legal. New York is in the process of attempting to pass a bill ...