I have some difficulties in learning more about the operational career of this interesting rocket in US service, whenever it is USAF, USN or ANG; other than vague "operated by the US".
As I understand, while it was produced since 1973 and then amply operated by Canadians and British in particular, it seems it took quite some time for Americans to adopt it and it is not clear how widespread the use actually is (was it only limited to helicopters and not fast movers?).
I run into an old journal article mentioning ANG evaluating the weapon in 1984, and that is likely the only relevant information I have on introduction timeline. I understand MK66 (HYDRA 70) rockets started quickly replacing MK44 since 1981, so delays with CRV-7 sounds reasonable.