Kachalsky is a perfectly clean, well-designed case for US Supreme Court review. Gura did this one very right
* It features multiple plaintiffs so that the loss of any one plaintiff doesn't sink it.
* At least one of the plaintiffs has beyond-normal "good cause".
* It's in NY where there's no open carry, so the court has a total blank slate on which to design a carry system that meets constitutional minimums.