@Contrivance Yes it drops two squads and AT gun. Still, I have never seen AI using it and I play a lot with AI (I'm shit RTS player). If it works for AI somehow then it's extremely rare and this should be fixed too.
@eliwood
I found it, thanks. It was Paratroopers' file that caused problems, which is weird because it was done just like every other edit.
Anyway it still doesn't seem to work. I added Sturmpioneers' StG44 to Volksgrenadiers
"..\\..\\weapons\\smg_mp44_default\\smg_mp44_default",
and gave them this weapon in Attributes editor, yet they are still invisible...