Before I thought this wouldn't be a possibility but now fallout New Vegas has a mod that adds fully functioning cars that feel like cars so anything is possible for mods to me now.

I was wondering if any modders would know how to make a mod that makes weapons and armor evolve in a sense. The mod in question would make it so that using a weapon a certain way would have a very very very slim chance that the weapon would gain a legendary trait. Like using a critical hit with a gun would have a .005% chance for that gun to gain the LUCKY enhancement, Or getting hit by a melee weapon has a slim chance to give you an anti melee enhancement. Just a thought for anyone interested.