Hits scored by a weapon with the Anti-tank trait against an Infantry or Cavalry model treat their AP as 0, regardless of the weapon's base AP value.
Hits scored against a Structure by a weapon with the Bunker Buster trait count their AP as double its normal value, e.g., an AP of -3 would become -6. Weapons with the Bunker Buster trait can damage Structures.
4"
1
5+
-1
Anti-tank, Bunker Buster