Gamma World: The Infinity Arc
The Iron Society
This is a group of human mutants bent on the destruction of all non-mutated Pure Humans. Its groups are scattered about the world, especially near radiated areas. The Iron Society is very powerful in battle because its members use both mutated powers and ancient weapons of all sorts. They obviously will not mingle with humans, but can be found in societies of other mutants.
They might be hateful of pure humans, or just see them as pathetic and inferior, but most are hateful. Their symbol is a hammer in a circle, usually minted on a coin.