The mi24 is an armored bird & thus the AI with light mGuns won't fire at it
They will if was, say a cessna! But ya could easily make aquick addon; just grab the orig. config and
copy the jeepMG part, then change the "threat" part :
try & set it this way :
threat[] VSoft, VArmor, VAir
threat[]={0.4, 0.9, 0.9};
This should do it I hope