Ironblasters are the largest, and therefore the most powerful blackpowder weapons in the Old World. They were originally created by the ancestors of the Giants, the great Sky-Titans. With their downfall, the Ogres have claimed these guns for themselves.
Due to its enormous caliber, the Ironblaster is loaded with regular-sized cannonballs in the same way as the Empire cannon might be loaded with the grapeshot. It proceeds to fire with a blinding flash and a truly deafening roar, the by-product of vast quantities of blackpowder. Each cannonball is propelled at a sufficient speed to smash through the stony hide of the Warsphinx, leaving no chance to the humanoid soldiers. Indeed, the pulverised remains are impossible to indentify from each other.
For the sake of extra mobility, the Ironblaster is mounted upon a Rhinox, just like a Gnoblar Scraplauncher is. However, no Ogre would trust such a rare weapon to the Scrappers, preferring to fire it themselves.