Neutron Laser Projector

The Neutron Laser Projector is the strongest weapon that can be mounted on any tank of the Imperium. It is only found on the Valdor Tank Hunter and the Cerberus Heavy Tank Destroyer.The power of this weapon can only be compared to Titan-size weaponry. The neutron energy beam emitted by the Neutron Laser Projector is capable of rupturing the enemy armour on a molecular level, resulting in huge explosions. Only the most super-heavily-armored tanks and Titan-scale vehicles can hope to outlast the force unleashed by this laser. Even if a target is not destroyed outright, the neutron energy of this attack will cause electro-magnetic shocks that overload and damage the enemy's electronics and systems.

The weapon is retro-engineered from wreckage originating in the Dark Age of Technology and few members of the highest echelons of the Mechanicum understand this temperamental technology. As is the norm with many powerful relics from that time, very few Forge Worlds are still able to produce or maintain them, notable ones are Mars, Laethe-het and Cryaxus III. Even though the weapon is very powerful, only a scant number of the oldest armoured regiments of the Imperial Guard or units of the Space Marine Chapters have access to vehicles equipped with Neutron Laser Destroyers among their assets.

Despite its power, the weapon suffers from two serious drawbacks. The weapon's nuclear-arc reactors are inherently unstable and can cause an apocalyptic explosion if damaged or destroyed. This is most problematic for the Valdor Tank Hunter, where the sheer bulk of Laser and power source touch the limit of the venerable base of the Macharius Heavy Tank, resulting in little shielding for the temperate reactor. The firing arc of the weapon is also severly limited for this tank, the projector can only be moved horizontally and only for the very limited span of 22 degrees.

If an attack by the laser does not transfer the full energy discharge onto its intended target, the weapon will suffer from a dangerous feedback that will damage the whole tank.

Canon Conflict
In Imperial Armour - The Horus Heresy - Book One: Betrayal the Cerberus' main weapon is listed as being called both a Neutron Laser Projector and a twin-linked Neutron Laser Battery. The weapon is called a Neutron Laser Projector on the vehicle's page on the Forge World website. This will be used as its canon name until otherwise noted by Forge World. The Cerberus will be featured in the upcoming Imperial Armour - The Horus Heresy - Book Two - Part One: Massacre and whatever name is used in that book will then be considered canon.