how do I hide the arms in the player model?

So I want to make custom arm movements for a datapack e.g. carrying a log or reloading a gun.
My idea is to somehow hide the player's arms and then summon 2 item displays, one for each arm, that can be moved around freely.
so, is there any way that I can hide the arms, or even a different way to do this entirely , without making the whole player invisible?