Individual Weapon - 2 separate Upgrade Paths

[JackCandem]

Hey there. I want to create a Weapon that works like this: You start with the basic weapon but you can upgrade it using a Prestihatitator and the needed Material.
But there are many different upgrades which can't be active at a time.
The weapon would have a shaft and a blade (duh). Both parts could be upgraded separately. 
For example you can have shaft1 and blade2 and then change to shaft4 because it has better fitting benefits without loosing blade2.

I hope you get what I am trying to explain and maybe have a Idea how to have two different Parts in one weapon.

[rezecib]

@JackCandem, Hmm, as far as I know, the way that the character animations are set up wouldn't support doing this visually-- that is, you'd have to have an anim for every combination of shaft/blade. The same goes for the inventory item art.