Standing taller than even a Leviathan Dreadnought, the Saturnine Siege Dreadnought is a walking colossus, piloted by a Space Marine who is psychically attuned to his equipment. They engage their enemy from mid-range, obliterating vehicles and infantry alike with punishing salvos from a range of devastating weapons.

The Chiron Configuration is armed with disintegrator cannon and heavy plasma bombard arm weapons, plus a choice of chest-mounted photonic incinerators or twin concussion resonators. It features a number of assembly options including leg armour with standard or stylised trim, a Loyalist and a Traitor gorget, two head options with two face plates each, an optional sculpted halo, and three sets of front-facing armour plates.