You can look at this website- http://www.calguard.ca.gov/g3/Pages/Volunteer.aspx
It's linked through the Calguard site, but I believe it's universal once inside. You have to log in with either your AKO info or CAC. I've never volunteered for anything through this particular outlet, but I believe other people in my battalion have. Good luck bro!
EDIT:: Scratch that, it SAYS it's for guard/reserves. However, IIRC, there's contact info for the units seeking slots filled. You may be able to contact them directly and inquire if you meet the requirements. I would advise being discreet about this though- I don't know how touchy your CoC is about being circumvented.
"... You feel the anger thinking of the loved ones you will never see again, and losing your life infuriates your soul. You rage to get to your feet and grab for a weapon, any weapon. Regardless of your race, culture, or religion, you want to die standing, fighting like a warrior, an American, so others won't have to. For those looking for a definition, this is the price of freedom.”
SGT Thomas Macpherson KIA 12 OCT 2012
SFC Ryan Savard KIA 13 OCT 2012