Mechanized arm - hard surface, rigging and animating practice

Mechanized 🦾 arm. Hard surface, rigging and animation practice.
It was my first time rigging and animating anything in @blender.official and first time texturing something in @substance3d

Design salvaged from the same sculpt I did for ELV-1 from one of previous posts.
16.5k tris total (yeah, I know...).