Graviton Gun A target hit by a graviton gun is always affected, no damage roll is required. A living target is immobilised for the remainder of the game and may not move or shoot, although a psyker may continue to use his powers. If the target is a vehicle, roll for hit location as normal but ignore armour penetration. Roll for damage on the appropriate vehicle location damage chart(s) adding +1 to the dice score. Against buildings roll to hit and if a hit occurs roll for damage and add +1 to the result