Rapid Fire Plasma Launcher.
A twinned pair of prototypes recovered from the ruins, these weapons seem to be attempts to create rapid fire plasma weapons bringing the power of the weapons against the Men of Iron. And it worked to an extent.
The first variant has versions ranging from pistol to cannon, with the theoretical diagrams of larger weapons being recovered, but not built. These weapons are capable of rapid fire equal to that of their equivalent Impaler. However, the plasma fired by these weapons is only half as hot as that fired by more conventional weapons. This still makes it significantly more powerful than an Impaler weapon, but due to its costs it is not recommended that these weapons be deployed extensively beyond the Helguard.
The second weapon system seems to have been made with the intention of keeping the full power of the Plasma weapons intact and surprisingly we have the designs of two of these weapons already. The Plasma Flamers which while complicated are simple compared to some of these weapons. Appearing more like Imperial weapons with a massive number of coolant tubes and exhaust vents these weapons were certainly not fully developed as they require a strong human to use even when in Power Armour. Appearing in versions ranging from a pistol to a heavy rifle (a grand total of three weapons) these devices are only capable of firing in burst of three shots with a five second interval in-between. During this time, the devices will vent vast amounts of waste heat to the point that any non-power armoured soldier will be flash boiled and those in basic power armour will be uncomfortable. It has also been determined that over riding the burst function is possible, but not recommended as the waste heat will either cause the device to explode in spectacular fashion, or simply melt the user and all around them for a considerable distance. The trade-offs for the weight, the time between bursts, the personal danger and the cost is that each gun is effectively three plasma guns in the same space that are very likely to hit the same target when used by a skilled opponent. And as many soldiers will tell you the number of things that can be hit three times by a Plasma gun and not feel it is very small.
Super Exitus Series
A theory among the Mechanicus of the Trust is why the Super Exitus Rifle was discovered, but no equivalent guns were found for other variations (such as pistol, carbine, rifle ect.) Well those designs have been recovered and the reasons pieced together from the Muspal archives to the point that a conclusion can be guessed at. Currently there are several weapons in the Super Exitus series from pistol, to assault rifle, to shotgun and finally the only weapon we had previously recovered the sniper rifle.
The premise behind all these weapons is the same, a unique launch mechanism based on incredibly potent gravetic manipulation to fire a bullet at speeds comparable, if often lesser than the speed of the Super Exitus Rifle, which as we know can gravely injure almost anything hit by the weapons. The obvious question of why the Dark Age did not deploy these weapons only the sniper rifle is one we have concluded was due to cost effectiveness. All these weapons use Relic Material, some to a lesser extent than others, but all do. However, the sniper is the only one currently capable of firing different forms of ammunition rather than the standard adamantium spike rounds (and it has to be adamantium, no other materials will do they will either burn up or deform under the speed and thus friction they are placed under) and can do so from a longer distance than any other. This puts it far away from the front lines where the operator and the gun is not as likely to come under fire risking the loss of the weapon while still being an incredibly dangerous threat. While mass deployment of these weapons on any scale is a dream, we should be able to find a use for them. The pistols would make good side arms for the Super Elite Operatives at least.
Please tell me any mistakes I'm kinda tired.
@Durin.