If I have missed it somewhere please forgive my ignorance. Are we to assume that the AC bonuses for cover are of a type that will add to ranged touch AC? My pdf of the book just says +4AC
So I assume that cover does not provide an AC bonus to guns touch attacks?
Cover is not an armor bonus or a natural armor bonus or a shield bonus.
As such it applies to touch AC and therefore applies to attacks from firearms in the first range increment.