The Deluxe Edition does not seem to provide any of the described items on the Steam page. If there is there a trigger for them to be added to the loot box, then an in game description or something would be nice. If the Deluxe Edition no longer provides anything, because it's out of pre-order status, then it should be updated or removed on the Steam store.
They are actually skins. You can apply them on most weapons at the shop. You can't use them on the base weapons however