My copy of Stars Without Number Revised has arrived for me. My only quibble is the lack of ranɡed stun weapons but my other SWN books can make up for that.
The stun baton's effects don't even have a special tag or anything. The description basically just says, "if this would have killed somebody, it doesn't, they just wake up in a few minutes." It's trivial to apply that to a laser pistol (offer void vs. robots), change the name to neuro-disruptor and you're done.