Ardex-Defensor A model with the Knight or Titan Unit Sub-types that has weapons with this special rule may make the Overwatch Reaction when it is triggered by models that do not have the Knight, Titan, Super-heavy, or Lumbering Unit Sub-types, or that have fewer than 8 Wounds. When making Shooting Attacks as part of the Overwatch Reaction, the Reacting model may only make Shooting Attacks with weapons with this special rule.
Sunder Attacks with this special rule may re-roll failed Armour Penetration rolls against Vehicles and Buildings (both with Shooting Attacks and in close combat) and re-roll Glancing Hits, in an attempt to instead get a Penetrating Hit, but the second result must be kept.
Twin-linked When attacking with a weapon that has this special rule, the controlling player may re-roll all failed To Hit rolls.
Twin-linked Blast Weapons
If the Scatter dice does not roll a Hit, you can choose to re-roll the dice when making a Shooting Attack with a Twin-linked Blast weapon. If you choose to do so, you must re-roll both the 2D6 and the Scatter dice.
Twin-linked Template Weapons
Twin-linked Template weapons are fired just like a single weapon, but must re-roll failed To Wound rolls and Armour Penetration rolls.
