Hekaton siege claw

"Attacks made with the Armour-breaker (x) Special Rule can sometimes inflict an extra point of Damage."
When any Armour Penetration Test is made for an Attack or Model with Armour-breaker (X) Special Rule, and it results in a Penetrating Hit - roll a Dice. If the result of that Dice roll is equal to or greater than the value of X attached to this variant of the Armour-breaker (X) Special Rule, then the Damage Characteristic of that Penetrating Hit is increased by 1. Note that the armour-breaker (X) Special Rule may only be triggered by an Armour Penetration Test and has no effect when making a Wound Test.

"With a Weapon that has a Breaching (X) Special Rule there is a chance that a Wound Test may result in the Wound ignoring Armour Saves."
When any Wound Test is made for an attack with the Breaching (X) Special Rule, if the result of the Dice roll, before any modifiers are applied, is equal to or greater than the value of X attached to this variant of the Breaching (X) Special Rule, then if a wound is inflicted by that Wound Test, that wound becomes a 'Breaching Wound'.

A Breaching Wound is always treated as having an AP of 2 regardless of the Characteristics of the Weapon used to make the attack.

"Weapons with the Shock (X) Special Rule have a chance of inflicting Statuses on Vehicles even if it does not penetrate their armour."
When making a Hit Test for a Weapon with this Special Rule against a Target Unit that includes any Models with the Vehicle Type or Walker Type, the result of the Hit Test before any modifiers are applied must be checked. If any Hit Test for a Weapon with the Shock (X) Special Rule results in a '5' or '6' before any modifiers are applied, then all Models with the Vehicle Type or Walker Type in the Target Unit gain a Status at the end of Step 11 of the Shooting Attack process or Step 10 of the Initiative Step process. The Status gained in indicated by the value of X attached to that variant of the Shock (X) Special Rule. If the Model already has the stated Status or the attack would apply the Status multiple times there is no additional effect and this Special Rule never causes a Model to lose Wounds or Hull Points. Hits inflicted by a Weapon with this Special Rule must still have Wound Tests or Armour Penetration Tests made for them, and are not discarded if they trigger this Special Rule.