Spine bone rotation problem

As result i want camera view like in counter-strike(arms and weaponds rotates with camera) what i do, camera child of head, and for vertical view i rotate not camera but spine bone

If i set pivot as parent and rotate camera view is fine, but its broke shooting animation. How to rotate bone around pivot X without broke animations?

Is this going work? -> make my own animation which uses only camera, hands and weapon? without spine

This is bone and this is pivot