His story is presumably similar to the one of his Earth-616 counterpart's until Brent Jackson took over Weapon X.
He was brainwashed by Mesmero to wipe out Gene Nation and kill the Neverland prisoners.
He was later recruited into Wolverine's new X-Men. After five years working with the X-men, Weapon X found the frequency Mesmero used to control him in the first place.
Under their command, he killed Mystique, Sunfire, Aurora, and Deadpool and injured the others but managed to kill himself before he could kill Wolverine.
Seemingly those of the Christoph Nord of Earth-616.