CoD/Battlefield 1 style FPS camera

How do you make this style of FPS Camera?

It seems to have standalone detached FPS arms which hold your weapon while also utilizing some sort of Full body in FPS view to cast shadows and grant body awareness…

I have the Rifle anim set Pro from Mocap and AK47 from Ironbelly, and I cant figure out how to cull the arms and head from the Full body