The Horus Heresy Mechanicum Castellax Battle-Automata Maniple Plastic Kit

The Mechanicum Castellax Battle-Automata Maniple is a multipart plastic modelling kit from Games Workshop's Horus Heresy range. It allows hobbyists to construct two Castellax Battle-automata, which are large, humanoid combat robots used by the Mechanicum during the Great Crusade and Horus Heresy eras. These formidable machines are designed for siege warfare and shock assaults, standing approximately three times the height of a standard human figure in the setting. The kit offers extensive customisation through its 191 plastic components. Each automaton can be armed with either claw-like shock charges or circular power blades, alongside a choice of integrated bolters or flamers. Shoulder-mounted weapon options include two mauler bolt cannons, a darkfire cannon, and a multi-melta. Further personalisation is possible with three different arm joints per model, plus adjustable waist and shoulder joints, enabling a variety of dynamic poses. The shock charger claws can be modelled either gripped shut or open. The kit is supplied unpainted and unassembled, and includes two 60mm round Citadel bases and a detailed transfer sheet with 558 waterslide decals for adding Mechanicum iconography. This set is ideal for hobbyists building a Horus Heresy Mechanicum or Legio Cybernetica army, or for collectors who enjoy assembling and painting large, detailed robotic miniatures. The high level of poseability and weapon options allows for creating unique models that can represent different battlefield roles. As a core unit in the period, the Castellax provides a powerful and visually imposing centrepiece for any 30k force.