Organ Gun
From Age of Sigmar - Lexicanum
Organ Gun are war machines created and used by Ironweld Arsenal armies. These lavished weapons when well-build can last for centuries.[1][2]
It consists of a four-barrelled cannon set on broad wheels. Engineers can maintain the Runes of Forging that make sure the weapon does not misfire in battle.[1][2]
Construction
To build an Organ Gun it requires an expert Cogsmith with a specific set of skills, which ends up carrying their pride.[1]
Crew
Three Duardin crew this war machine and if it needed they can protect themselves with their tools. [2]
Sources