Ah, the infamous, "midnight Chinese" (no offense intended) panzergrau PaK 40s. I find it humorous that you had to get them from the States, though. It really is the scheme they should have released it in in the first place.
EDIT:
What a dumbass, I mistook the grey PaK for the unauthorized grey FlaK 36.
Great haul, anyhow. It still vexes me that they could release the Marines 2-3 times but never slip a M97 in there.