Impact Hits (2 hits) and Devastating Charge (+1 Str, +1 AP)

If Charging, the model part can make a Special Attack which is resolved at Agility Step 10, and inflicts X hits, using the model part’s Strength, Armour Penetration, and Attack Attributes, but not Weapons.
Remember that attacks multiplied into several hits are allocated after establishing how many hits are scored (i.e. after the attack has hit). If more than one model part of a combined model has Impact Hits, only a single model part (chosen by the model’s owner) can perform its Impact Hits in a Round of Combat.

A Charging model part with Devastating Charge, or using a weapon with Devastating Charge, gains the Rules and Characteristic modifiers stated in brackets.
For example, a model part with Devastating Charge (+1 Str) gains +1 Str when Charging.