In the alternate reality of Earth-295, known as the Age of Apocalypse, James Howlett operates under the codename Weapon X, a designation reflecting his successful participation in the Canadian Weapon X program that bonded adamantium to his skeleton. This version of the character first appeared as part of the landmark "Age of Apocalypse" crossover event in X-Men: Alpha #1 (February 1995), with prominent focus in the retitled Weapon X series #1–4 (March–June 1995), written by Larry Hama and illustrated primarily by Adam Kubert. In this dystopian timeline, where Apocalypse's conquest of North America followed Charles Xavier's premature death, Weapon X functions as a cynical loner and smuggler, ferrying human refugees across the Atlantic to safety in Europe while evading Apocalypse's culling forces, initially resisting recruitment by Magneto's X-Men until drawn in by encounters with Jean Grey.
Weapon X retains the core mutant abilities of his Earth-616 counterpart, including a regenerative healing factor capable of recovering from severe injuries and extending lifespan, superhuman senses, strength, agility, and stamina, as well as three retractable adamantium-coated bone claws in each forearm. Following a brutal confrontation with the brainwashed Prelate Cyclops, he loses his left hand to an optic blast, resulting in claws protruding only from his right hand thereafter, often leaving the stump exposed or minimally augmented. His adamantium-laced skeleton renders him nearly indestructible, complemented by extensive combat experience, tactical prowess, and a berserker rage that enhances his lethality in battle against Apocalypse's elite enforcers.
Key developments center on Weapon X's romantic relationship with Jean Grey, whom he rescues from Mister Sinister's laboratories after she is captured, marking a rare emotional anchor in his otherwise detached existence. Operating independently with Jean, he aids the Human High Council in their resistance efforts, uncovering Apocalypse's plans and facilitating evacuations. In the climactic events of X-Men: Omega (1995), he participates in the assault on Apocalypse's stronghold, but refuses to abandon the dying timeline, disappearing amid the chaos as the reality is reset. Subsequent revisits, such as the 2005 Age of Apocalypse miniseries, depict his survival into a continued dystopia, where grief over Jean's death leads to his ascension as Apocalypse's reluctant heir under the name Weapon Omega, before ultimate defeat, underscoring his tragic evolution from reluctant hero to burdened successor.