This is my fully rigged biped Futuristic Super Soldier with armor geo that transforms. See video below to see how it works. Rig comes complete with FK/IK functionality for limbs and spine with extra tweaker controls to enhance flexibility. The armor transformations or SDK driven and are individually controlled by different controls located for each limb of the body so that you can edit your animations with offsets. For example: if you want the armor of the arms to have a slightly different timing for the transformations from each other, you can easily adjust as you wish since each limb animation has been separately assigned to different controls.
This rig was rigged in Maya 2023. Make sure you have the correct Maya version or higher.
Video link for armor transformations: