Oops, Scourge of the inner sea. Caw caw! Yar matey!
Yeah, the gunslinger is to allow him to actually own a gun. In PFS you have to have Gunsmithing to even buy a gun. Ever.
Also gives him another pool for grit/panache.
There is a feat that seemed useless to me that may be cool to get... opening strike. If you hit with a ranged Attack, you get +4 to hit with your next melee.
Have to see... This combo may not actually work as well as I am hoping.