[nzwilliam]

It does sound like a field modification aye, in which case - did all airforces that used these aircraft make this modification and if not how common was it?

Perhaps the ideal would be to have the two configurations in the loadout options, let each player decide or alternatively online the server could restrict the loadout options depending on the theatre of Op's or scenario the map is trying to represent.

It's not easy finding information on this aspect of the Mig-15 though.