Unarmed attacks reflect ordinary kicks and punches.
Unarmed attacks always add the attacker’s Punch skill to damage rolls, unlike other weapons. Kinesis wraps, spiked knuckles, and other small fist weapons may be treated as small advanced or primitive weapons that use the Punch skill and add the skill level to their rolled damage, but not to Shock. Such weapons do not augment a hero with the Unarmed Combatant focus.
Primitive weapons are often unable to harm targets in powered armor, while advanced weapons can ignore primitive plate and hide protections.