Read more about Forearm at: Wikipedia

Official Site: Marvel comics

Forearm (Michael McCain) is a fictional mutant villain in the Marvel Comics universe. He was first introduced as a member of the Mutant Liberation Front in New Mutants #86, after Rob Liefeld took over as the penciller of the series. Forearm has always been a mainstay on the terrorist group's roster, even staying through leader change and surviving incarceration.

Forearm was one of the founding members of the terrorist organization known as the Mutant Liberation Front (or MLF). One of their first missions under the leadership of Stryfe was to liberate the incarcerated New Mutants members Rusty and Skids. They broke them out of prison and the pair joined the MLF out of confusion (and, as later evidence showed, neural implants kept them there). Forearm continued to be a mainstay in the team's ventures, including fighting Wolverine, Sunfire, X-Factor and other heroes.

Under the leadership of Cable the New Mutants became the paramilitary organization known as X-Force, and began to be more aggressive in their campaigns. In one such mission X-Force discovers a hidden MLF base and, while fighting Forearm, Reaper and other members of the team, nearly lose their lives when Stryfe orders the destruction of the base.

Later, Garrison Kane stumbles upon Forearm, Wildside, and Sumo in the Canadian mountains and, after a brief scuffle, follows them through their teleportation portal, where he is tortured.

Forearm has not been a contender in any CBUB matches.