If Bush is pro-gun, that's news to me. Ask him if he intends to re-up the "Assault Weapons Ban". Hint: He stated that he would before he was elected.
Watch how fast he signs a bill to outlaw the .50 caliber guns.
9-11 has changed everything in regard to how the elected perceive gun rights. Attacking guns is so uncool right now that even Chuck Shumer has lost his tongue. I could be wrong but I think you are not giving W enough credit.