Chem-inhaler The unit will always test Morale, Leadership or Pinning with no negative modifiers. If they fail a Morale check for 25% shooting casualties, they will be pinned rather than fall back.
Xeno-Fighters Xeno-fighters hit on a 3+ regardless of respoective Weapon Skill values against their preferred enemy. This advantage does not apply against Independent Characters, Tyranid Monstrous Creatures, or Monstrous Creatures.