This kit is compatible with the Leviathan Dreadnought Ranged Weapons Frame, allowing you to outfit your Dreadnought with a variety of powerful heavy munitions.
You will need a copy of the Warhammer: The Horus Heresy – Age of Darkness Rulebook and either the Liber Astartes: Loyalist Legiones Astartes Army Book or Liber Hereticus: Traitor Legiones Astartes Army Book to make full use of this model in games of Warhammer: The Horus Heresy. Rules for using the Leviathan Siege Dreadnought in games of Warhammer 40,000 can be found in the Warhammer 40,000: Imperial Armour Compendium