If you are 100% vet like me you can. But honestly its not worth it anyways. The commissary may save some but the selection sucks, and the PX must be hiding that 25% savings because I dont see it when I go.
Yep, I pretty much quit shopping at the commissary and BX. I got a Mac Book Pro for less, even with the tax, at Best Buy, where the selection is better, and the floor staff actually have some idea what they are talking about.