Kinetic Armor Class (KAC)

Your Kinetic Armor Class (KAC) represents the defenses you have against attacks that primarily deal damage as a result of a physical impact. This generally includes attacks that deal bludgeoning, piercing, or slashing damage (described as “kinetic attacks”), attacks that don’t otherwise specify which AC they target, impacts from falling, and damage from crushing or constriction. When a foe’s attack would deal such damage (if he is using, for example, a starknife), even if it also deals energy damage, his attack roll result is compared to your KAC to determine whether he hits