MI court strikes law forbidding stun guns
Decision here. It's a trial court decision, and the prosecution has said it will appeal. The court notes that the law entirely forbids their possession, like the handguns bans at issue in Heller and McDonald, and raises in a fn the significance of Heller's reference to protecting guns "in common use" in light of the fact that a new technology may not go into common use simply because it's outlawed before it achieves that status.
Via the Volokh Conspiracy, where Prof. Volokh links to his Stanford L. Rev. article on the very subject.