The Magna Lascannon is a massive Laser Weapon deployed by the combat walkers of the Questor Imperialis, the Imperial Knights, and by the Renegade Knights of the Questor Traitoris. The Magna Lascannon weapons is used only by the Acastus Knight Porphyrion, as the weapon is too large for all but the Acastus Knight-chassis to support.
The Magna Lascannon is a devastating weapon that can obliterate even the most heavily armoured targets. These Lascannons are several orders of magnitude more powerful than even the Sollex Pattern Heavy Lascannons of the Mechanicum Taghmata. The Acastus Knight Porphyrion uses two sets of Magna Lascannons in a twin-linked configuration, providing the Acastus Knight Porphyrion with an extraordinary amount of ranged firepower, enough to allow it to even combat enemy Titans.
- The Horus Heresy - Book Seven: Inferno (Forge World Series) by Alan Bligh, pp. 68, 104-105, 296-297
- Imperial Armour Index: Forces of the Astra Militarum (8th Edition), pg. 95
- Imperial Armour Index: Forces of Chaos (8th Edition), pg. 63
- Forge World Webstore - Acastus Knight Porphyrion