Moving camera height when looking down sights on pistol.

I have made a weapon in the devkit using the machined pistol FPV rig as a base. The it all came out fine however when I aim down the sights the camera is just a bit too low. Is there any way to raise the camera up or lower the weapon a bit when aiming down the sights?

Repaint it to the offset joint, not root.

I repainted it to the offset. It still hovers in the same position. How do I go about adjusting the camera or gun height?