FPP rig

Hi, im trying to retarget 2 different animation from 2 different skeleton, from the documentation Animation Retargeting (Different Skeletons) | Unreal Engine Documentation

unreal has a default humanoid rig that we can use, is there a first person hand rig that I can use to retarget 2 first person hand animation from 2 different first person skeleton???

or is it possible to create a hand rig from shooterexample using 3dsmax?