LOCKSTEP

Sentinel Fireteam Alpha were cybernetically bonded with Sentinel tech and nanobots. Because the "Destroy All Mutants" protocols were so deeply enmeshed in Sentinel programming, Larry Trask found a way to avoid overriding Fireteam's independent thought with these protocols by harvesting nanotech from Juston Seyfert's inexplicably reprogrammed Sentinel. Unfortunately, this too seeped into their brains before too long, through a degredation known as "grafting".

Lockstep began experiencing grafting before Corina Ellis and Perimeter used him for further experiments. He died physically, but Ellis expressed that his corpse might still be animated to serve Graymalkin even after that.

The Sentinel Firearm were advertised as survivors of various Marvel crossovers. Lockstep was a soldier exposed to unknown radiation during the Death of Doctor Strange event.