In this video, I am going to add a upper body animations in the advanced locomotion system v4. There are many way to add the upper body animations, but I think this method is quite easy and the result is quite good (except for the spine's rotation because the spine of the firing animation is rotated to the right, if you find a animation that the spine is facing forward, I think the result will be better).
Or you can disable the "Mesh Space Rotation Blend" of the "Spine" "Layered blend per bone" in the AnimBP -) LayerBlending
But this will affect the spine blending for other animations, so I think it is better to make a animation that suit your own needs.
-----------------------IMPORTANT-----------------------
In 7:03, I remove arms slots to prevent the arm return to the montage's position. I found a better way to do it and I put it in the beginning of part2.
