OR they could just use the Ammo name, as they did fire the same ammo, but they had slightly different performance traits depending on the gun they were being fried from.
20×138mmB
I really do wish they would give each faction it’s own specific and campaign appropriate AA gun.
It’s not though, The gun on the Flakvierling 38, was the Flak 38, so it should really be referred to as the Flak 38 in game.
The KwK, is a shorter gun at L 55 compared to the L 65 for the Flak 38, KwK is also German nomenclature for a gun that’s mounted in a tank, so it’s not just the name is different of the gun is actually different they are firing the same ammunition though but two different performance standards.