Modular exoskeleton

From Halopedia, the Halo wiki

A fan-made image of Mister Chief created for use in Template:Realworld.
This article contains information about a non-canonical subject that, while official, is not part of the established Halo universe.

Modular exoskeletons were a planned feature for Halo 5: Guardians that was cut during production.[1] They were seemingly inspired from a similar concept for Halo 4 before the Mantis was developed.[2]