A Magna-melta is a heavy, vehicle-mounted, short-ranged, area-effect heat ray cannon. Magna-meltas were originally designed for space assault craft like the Caestus Assault Ram to enable them to turn a large cubic volume of starship hull-plating into liquid slag.
The effects of a Melta Weapon of this magnitude on less durable targets such as main battle tanks and living matter are simply catastrophic.
The potential uses for this powerful weapon were not lost on the Mechanicum Tech-priests of Mars, who soon began mounting the Magna-melta upon the turrets of the Deimos Predator Infernus during the Great Crusade.
- Imperial Armour Volume Two (Second Edition) - War Machines of the Adeptus Astartes, pg. 144
- Forge World Website - Deimos Pattern Predator Infernus (Image)