Source: Mutant Chronicles
Threat Assessment: 8. Alone they aren't that horrible to fend against. They aren't that bright and they have one huge claw arm. They are tough but not supernaturally so. Problem is that there are millions of them. Also, they will grab the dead and wounded and turn them into mutants. Point of order: they probably aren't mutants and more of a cyborg/bio enhanced creature but are you going to tell them?
Limitation: Not too bright.