Where do I find the military uniform in CAS?

So, is anyone else having trouble unlocking the military uniforms normally? I have a soldier in my household who is at level 4 or 5 of the career and has already worn several different uniforms, but none of them can be found in CAS. Very early on, I did manage to set the brown soldier T-shirt as part of his hot weather outfit, but now when I go to CAS and click on this T-shirt he's wearing, it doesn't even take me to the item in the catalogue.