Making Mod Weapons Available to Mercs?

[Aedex]

I was trying to use mod aircraft (Su-27) in a mercenary campaign started with the Campaign Editor; however none of it's weapons appear for purchase in the Loadout Screen. This means that I an unable to put anything on it at all. Is there a value in the weapon's .ini files I need to edit so it gets flagged to get added to this stock? I feel like it is probably obvious but I'm too new at this.

I tried adjusting "Exported" and the Service Years but that did not help. They were available in Single Missions and non-mercenary campaigns for sides that used Warsaw Pact weapons lists.

Thanks in advance.