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.
One Use/One Shot A weapon or ability with this special rule can only be used once during the course of a battle. Once a weapon with the One Use or One Shot special rule has been used to attack, it is no longer counted as a weapon and may not be destroyed (for example, by rolls on the Vehicle Damage table) or repaired by any other rule or effect.