This campaign uses the Firearms rules used in Pathfinder’s Ultimate Combat core book, with the following modifications.
Prerequisites: proficiency with firearms, Str 13
Benefit: Striking an opponent with the butt of a firearm deals 1d6 points of damage and does not provoke an attack of opportunity.
Prerequisites: Quickdraw, proficiency with Firearms
Benefit: Drop current weapon and withdraw new weapon as a swift action.