I would be very carefull on Tinker, as i work there to, if you have your gun in the car and get pulled over you might have a problem with the police, or even a randome car search. I would be on the safe side and keep the ammo away from the weapon and just say you are going to the range after work. Dont mean to get in your business, just watching out for a fellow Tinker Guy,
He said he leaves his car (with gun) at work and drives the company truck onto the base so this shouldn't be an issue.