A single suit of X-01 MK V was given to the Nuka-Cola Corporation, as part of their Project Cobalt.
While the first test models were issued to Presidential bodyguards, the X-01 was never deployed in larger numbers. However, although the suit was technically functional by late 2077, it was burdened with numerous issues that precluded widespread use in the field. It represented a radically new approach to designing powered armor, eschewing traditional design philosophies that defined the T series, and was a high-profile research project meant to supersede previous power armor models. The development of the X-01 began shortly before the Great War.
