My game features a system similar to the sphere grid of FFX, and a key element of the system is the ability to learn how to equip more weapons/armour. However, I can see no way to change what equipment a class can use after the initial possibilities.

For example, one of my characters starts off with the ability to use swords, and so their class can initially equip only swords. But later on, they would gain the ability to also use axes, which would require the class' possible equippable weapons to be changed during gameplay. Is there a way to do this withing the game's standard programming, or would I have to find a script to do this for me?

If all else fails, I'll have to make a compeltely seperate class every time a character learns how to equip new weapons, which would be ridiculously cumbersome.