SlotItem and AmmoItem can equip anything after change.

[Drconfused]

Working on my power series of mods and noticed that changing the SlotItem attribute in the blocks.xml ends up just like chaning the AmmoItem in the turrets makes it so you can equip anything into that slot and the item works as though you equipped the original.

Is there something I am missing or is this a hardcoded issue with not wanting to be able to slot more than one item?