Heavily-armed and impressively armoured, the Leviathan Siege Dreadnought is an alternative development of the highly successful Contemptor design. These rare and mighty engines are prized by Astartes commanders, recognised as savagely powerful siege and hunter-killer units capable of bearing a varied and devastating armoury. While some Legions valued the Leviathan for its crushing close combat momentum, others preferred to exploit its long-ranged potential, unleashing volleys comparable to a full battle tank.This plastic upgrade kit can be used to equip your Leviathan Siege Dreadnought with a variety of arm-mounted ranged weapons, allowing you to replace one or both of its mechanical fists for additional firepower, or outfit your Dreadnought with a pair of identical ranged weapons. The kit includes the components to build three heavy weapons for a Leviathan Dreadnought – a cyclonic melta lance, grav-flux bombard, and storm cannon – each of which can be mounted on either of your Leviathan's arms.This upgrade kit comprises 47 plastic components and is designed to be assembled with the Leviathan Siege Dreadnought sets, which are sold separately.