sideranautae
Mongoose
I found this prototype of the NASA AX-5 hard suit. Constant volume and allows for ~95% of movement range of a human.
I figured that mechanically that this could be a similar design for later combat armor or HE suits.
Here was the final version:

I figured that mechanically that this could be a similar design for later combat armor or HE suits.
Here was the final version:
