Constructed Pugilist (Brawler Archetype)
"Mutants whose mutations make using standard weapons or other gear difficult sometimes attach mechanical prostheses to their existing limbs. Many develop combat skills that use their prostheses so they always have a weapon at hand. Over time, these brawlers customize their mechanical limbs, adding additional weaponry and other mechanisms."
-- Constructed Pugilist (Brawler Archetype)