Here is a link that seems to say you can not use these facilities.
The link says this:
Unfortunately, the commissary benefit is very similar to a lot of other military benefits, including exchange privileges. Only active-duty service members, Guard and reservists, medical retirees, retirees, Gold Star widows, veterans 100 percent disabled due to service(you say you are rated 90%), Medal of Honor recipients and all of their respective dependents are granted commissary access.
Everyone else? Not allowed.
Bob Hicks, from Utah
I’m 76 years young and going as hard as I can for as long as I can.
“Free men don't ask permission to bear arms.” ― Glen Aldrich