Hiding R_Hand bone

Hello everyone! Today i have met problem that i don’t really know how to solve.
I need to scale bones of hand to hide them. But, i can’t hide R_Hand bone due it’s hiding weapon in hands as well.

Imgur: The magic of the Internet - with hand
Imgur: The magic of the Internet - without

And i wondering - is there any chance to hide it without affecting weapon in hands? I tried Clip Plane but it’s don’t hiding only hand, it also hides what don’t need to be hided.

Thanks for help!

P.S: Re-drawing weapon’s world model is not option