PeaceSells - Shooter Procedural Aiming

hi, this kit thingy is really good but i need some help changing the skeleton. ive fumbled to getting it almost done but when i aim the gun flies off behind the camera (it still rotates around when changing sight). yes, i did the VB stuff, and i have no idea why. also the… not aiming stuff works

EDIT: btw, im using the just arms stuff