An Icarus Ironhail Heavy Stubber is an advanced pattern of the common Heavy Stubber in use by the Imperium of Man intended for use as an anti-aircraft weapon. Like all Heavy Stubbers, the Icarus Ironhail Pattern is a heavy-barrelled ballistic Auto Weapon used for sustained fire. It is commonly deployed as standard armament on Primaris Space Marine Repulsor grav-tanks to provide anti-aircraft defence, but can be swapped out for the even more effective anti-aircraft punch of an Icarus Rocket Pod.
- Codex Adeptus Astartes - Space Marines (8th Edition), pp. 87, 182