LIGHTNING GUNS WOOOOH! Arc Weapons are a type of weapon utilised by the armed forces of the Adeptus Mechanicus. Unlike the other 'lightning gun' used by the Thallax, Arc Weapons are actually tried and true lightning weaponry. They are powered by bulky perma-capacitors shipped from Mars' great repositorum; some of these zinc-plated blocks store energy from days when the Imperium was young. Arc Weapons discharge energy with a loud crack, firing blots of blue-white electricity that can fry a man's brain or overload a war machine's data-cortex in a second.
On the tabletop they are basically Imperial Haywire weapons; come in pistol or rapid fire format for your pleasure. Also has a nice S6 if you don't want to shoot at vehicles for some reason, though at only AP -1 you'll need some luck to do more than scratch a Rhino’s paint.
There are several variants of the Arc Weapons.
Shooting from afar is fine and all, but in the grim darkness of the future, any tech that can't be applied at close range will be looked at with shame. Thus, the arc maul combines the power of a bludgeon weapon with the energy and electricity created by an arch engine to make one brutal CQC monster.
On tabletop, the Arc Maul is a Power Maul with a nifty rule you'll never use (but priced as such), iconic to Skitarii Alphas. A decent melee weapon for its price with nice Strength and AP.
The more Heretical version of the Arc Maul. Used by the Negavolt Cultist, the Electro-Goad is a weapon meant for pin-point strikes at machines and even living organisms, rather than beating it into a pulp like the Arc Maul.
These weapons are used by the Negavolts to defile and pervert the machinery of the Adeptus Mechanicus as the Goads brings out arcs of Warp-infused energy into the tip of the weapon to cause some Extra Heresy.
On the tabletop, these weapons are S2, D1 weapon with zero AP, so ain't doing too much to a MEQ. However, each hit roll on a 6+ with this weapon will score 3 hits automatically.
Arc Claws are a type of weapon used by the Adeptus Mechanicus, typically mounted on Kataphron Battle Servitors. During the Cyberghoul Wars, the burrowing Daemon machines of Warpsmith Votogr Bolga were met talon to talon by Metalica’s servitor defenders. It was the invention of the arc claw that turned the tide – a potent delivery system for the most sophisticated scrambler technology the Adeptus Mechanicus could devise.
On tabletop, the Arc Claw is a S+1 weapon with AP-1. It'll have the strength to wound infantry and light vehicles the Breacher manages to catch, and the AP to be a bother. However, anything heavier than a light vehicle is going to survive the scratch.
Taser Goads are a Taser Weapon which are like a sub-category of Arc Weapons that are used by the Skitarii. As its name implies, these Taser Weapons are essentially oversized and overcharged real life tasers.
Powered by a hyperdynamo capacitor, taser weapons store an incredible amount of energy. A solid impact will cause this energy to discharge in a scorching blast. After unleashing the electrical discharge, the remaining energy is stored by the electrothief prongs at goad's tip.
On tabletop, taser weapons have lousy AP but good strength, relies on each hit roll of 6+ causing 3 hits instead of one, meaning they can benefit from Conqueror doctrina to explode on 4+. Rerolls to hit (Remorseless Fist Canticle, Prime Hermeticon WT, Omniscient Mask relic) are common enough. The Taser Goad itself is a S+2 weapon and is available to Infiltrators and Skitarii Alphas.
Taser Lances are a Taser Weapon which are like a sub-category of Arc Weapons that are used by the Sydonian Dragoons. As its name implies, these Taser Weapons are essentially oversized and overcharged real life tasers.
Powered by a hyperdynamo capacitor, taser weapons store an incredible amount of energy. A solid impact will cause this energy to discharge in a scorching blast. After unleashing the electrical discharge, the remaining energy is stored by the electrothief prongs at the lances' tip. Because of its long length, Taser Lances can only be carried on the mechanical cavalry of the Mechanicus like the aforementioned Sydonian Dragoon.
On tabletop, taser weapons have lousy AP but good strength, relies on each hit roll of 6+ causing 3 hits instead of one, meaning they can benefit from Conqueror doctrina to explode on 4+. Rerolls to hit (Remorseless Fist Canticle, Prime Hermeticon WT, Omniscient Mask relic) are common enough. The Taser Lance itself is a S+3 AP-1 D2 weapon; now hitting at Str8 whether you charged or not.
Electrostatic Gauntlets are a type of weapon used by Adeptus Mechanicus Electro-Priests. Corpuscarii wear metal apparatus around their wrists that channels tremendous electrostatic potential from dorsal generators. This can be discharged in a cascade of killing lightning.
On the tabletop, Electrostatic Gauntlets behave like taser weapons despite not being one. Being S5 instead of S (User+2) and wielded by Corpuscarii only makes this weapons unable to be boosted by either Conqueror or Machine Might...but they can also be used as 12" Assault 3 taser guns.
Electroleech Staves are a type of weapon used by Adeptus Mechanicus Electro-Priests. The powerful capacitors built into the length of each electroleech stave allow them to drink every iota of electric force from those they strike - be they living or machine.
On tabletop, the Electroleech Stave is a S5 AP-2 weapon, which makes it behave like a SM power axe with extra damage and a chance for mortal wounds. Now you only need to get those Fulgurites into melee.
A small pistol based on Arc technology and most commonly used by Skitarii Vanguard/Ranger Alphas. Trying to use this to 'charge up' your phone or any other electrical appliances is heavily frowned upon by the Adeptus Mechanicus and the Priesthood of Mars.
Crunch wise, it is a very nasty little weapon. Essentially it is a 12" S6 AP -1 Pistol that can shred infantry (it wounds guardsmen on 2s) and can annoy vehicles as well. It works really well when paired with its much bigger brother, the Arc Rifle due to the Arc Rifle's rapid fire rule.
The Voltaic Pistol is a special type of energy weapon (Most likely an Arc weapon given its function) used by Adeptus Mechanicus Lectro-Maesters. These weapons can shock a target's animating energies from their body.
The Lectro-Maesters themselves are a type of Artisan Tech-Priest of the Adeptus Mechanicus who come from the same religious sect as the Electro Priests. Thus, they wield an array of technological marvels, such as a generator backpack which generates a powerful voltagheist field which sends out wraiths of energy whenever the wearer is threatened. These bursts of electricity can also act as a shield, prematurely detonating incoming munitions and dissipate energy projectiles. The Voltaic Pistol is one such marvel.
Unfortunately there are no rules for this weapon as of yet.
A rapid firing Arc Weapon used as a special weapon in Skitarii Vanguard and Ranger squads. The Arc Pistol's bigger brother. This is the gun you need when you want a little bit more range in your lightning cannon. Basically your typical tesla gun in sci-fi....no not THOSE Tesla weapons..
Crunch wise on the tabletop, it is known to possibly be one of the best-looking guns the Skitarii have. It's 24" Rapid Fire, which means it pairs well with its little brother.
The Arc Rifle is one of the most common Arc weapons found in the Mechanicum.
The Arc Lance is a type of Arc Weapon used by the Adeptus Mechanicus. Wielded by Secutarii Hoplites, this powerful spear is akin to the Arc Mauls used by their Skitarii Legion counterparts as well as the far larger version wielded by Cerastus Knight Lancers. The arc lance inflicts damage through short range blasts of coruscating energy augmented by an inversion field mounted in the paired Mag-inverter Shield. Thus the weapon is capable of both making a melee and projectile attack.
On tabletop, Arc Lance has a shorter range than the Arc Rifle, but compensates by being versatile, since it is a Str +3 melee weapon too. This means that Hoplites are formidable both at range and in close combat. Making the Arc Lance a very flexible weapon.
Vultarax Arc Blaster
The Vultarax Arc Blaster was a type of Arc Weapon. Primarily mounted on the Vultarax Class Robot, it was a a versatile weapon capable of burning out the cogitators and engines of enemy vehicles and robots.
The Vultarax Arc Blaster is the only airborne adapted Arc weapon designed during the later years of the Great Crusade. During the Horus Heresy, the Arc Blaster found its use against both traitor and loyalist AdMech forces during the civil war on Mars.
The large cybernetic machinery within the Mechanicum made its extremely vulnerable to Arc weapons with the Arc Blaster being one of the more notorious examples used during the civil war, with the Arc Blaster permanently shutting down vast swaths of battle automata and combat servitors in one shot.
Heavy Arc Rifle
A heavy Arc Weapon designed to slay the Daemon machines of the Dark Mechanicum, Heavy Arc Rifles send out shallow parabolas of crackling energy that revolve around each other, forming triple helixes as they blast forth. Should these ground upon a metallic target, they will swiftly overload its circuits and banish its animating spirit to the ether. Heavy Arc Rifles are part of the standard armament of Cult Mechanicus' Kataphron Breachers.
In terms of Crunch, it's a 36" 2 shot S6 gun. Comes default on Breachers. Use it to pop open any vehicles giving you grief or to reveal the tasty transported center.