Summer weapon skin for "Machinist"?

Will the “Midsummer Night’s Dream Weapon Selection Chest” be available for machinist when it releases?

I know the sale of the skins will be over before the class release but if you keep the box they’re in will it be possible to pick the machinist weapon from it once it’s released?

The summer clothes will be available for machinist since they are tied to the main archetype but it would be nice to have a matching weapon skin for it as well.

The weapon chests from previous releases has not been updated for classes coming after.

So I would not expect weapons boxes to be usable.
But the skins for “male gunner” you could keep and use for later (as you already mention).