Sounds like a bad idea to me. If you are determined to ctb, I think it's best to avoid complexity. That way there is less to go wrong.
A single firearm, provided it is of appropriate size and is used properly, will almost certainly kill you. (Putting it behind your ear does not count as using it properly, whatever gun you use.) If I was going to ctb with a gun (I'm not) I would use a shotgun, with buckshot.