Have Trouble With FPS Arm Animations

Hello all, I am a newbie.
I am trying to make a FPS game but which is not about games.So I need some arm/hand animations like grabbing,holding etc. There is a lot of animations for TPS Mannequin model in UE4 but there is no animations for FPS Arms.
So I am thinking about the finding the tps(full) model with desired animation and cutting the arms from it.Is that possible ? Or should I learn blender and animate the arms by myself ?
Sorry for my grammar,sentence logic etc. My English level is not good :smiley: