It seems everything in blueprints is the caliber that you used last in loadout, just buying or selling ready-made weapons in the shop don't show caliber at all. Same thing is with helicopters: if I spawn Overseer "snow" and then Overseer "standard", the standard one will be in the colors of the snow.
And please do something about those WHALERS-00301, I'm really tired of clearing the whole base to extract someone only to have a connection error 30 meters from extraction point.