I think this is where I’m going wrong then. When I bake the pistols other animations it would seam the root bone has no motion.
So from this, I’m thinking I’m baking the animation wrong. or the piston is not parented correctly.

You are correct only the arms had the equipt animation attached in the videos is sent. I mainly did that because there was no root motion on the arms equipt animation. I’m going to have a stab a re-baking everything and try to get that weapons root bone moving.