To OP:
Like i state in my previous post, most bases have their gun policy on the Base's website. If not, You should go to the MP station and ask for the policy in writing. i would suggest not ever mentioning to base authority that you do open carry outside base.
DO NOT listen to barracks lawyers or take an MP or anyone elses word for it (including mine). Answers are but usually a few clicks away. Each base has a different policy because its essentially the Base Commander's discretion. That's really your concern here, your posession of a handgun while on base and while entering/exiting is the only laws you should be worried about.
