History
Frank Castle's history is presumably similar to his Earth-616 counterpart's.
When intelligent zombies called the Respawned invaded Earth, a S.H.I.E.L.D./A.I.M. coalition assembled a team of robots called the Ennows to fight the zombies as machines couldn't be zombified. However, after the population of humans fell to almost nothing, the Ennows were left to own devices and and began fighting for themselves against the zombies. Castle chose to join the Ennows by voluntarily exposing himself to the Transmode Virus to protect himself from zombification.
When a group of human survivors were attacked by a horde of Respawned, the Ennows, including Castle, fought them off. A fight almost broke out between the survivors and the Ennows, but it was quickly broken up. The survivors were then taken into Ennow custody with Castle being one of the Ennows watching them. The Ennows planned to turn the survivors into machines through exposure to the Transmode Virus. However, the process was interrupted by a group of zombies consisting of superhumans with superhuman strength that were able to break through the Ennows' home, the Phalanx Wall. Castle was ripped in half by the zombies, seemingly killing him.[1]Paraphernalia
Equipment
Weapons
Guns