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Weapon Slot Primary
Weapon Type Assault Rifle
Trigger Type Charge
Flight Speed Hitscan
Noise Level Alarming
Fire Rate 1.33 rounds/sec
Accuracy 16.7
Magazine Size 10 rounds/mag
Max Ammo 540 rounds
Charge Attacks
Impact wImpact 35.0
Puncture wPuncture 245.0
Slash wSlash 70.0
Charge Time 0.50 sec/charge
Crit Chance 30.0%
Weapon Users Derim Zahn
Introduced Update 19.13
Discharge a rail of ionized death or throw the Ferrox like a spear and create a localized field of attraction no enemy can escape from.

The Ferrox is a Corpus Spear Gun introduced and wielded by Index broker Derim Zahn. Its Alternate Fire tosses the Ferrox as far as 50 meters, creating an electric field where it lands and pulling enemies towards it. It is available for research in the Energy Lab of a Clan Dojo.

This weapon can be sold for Credits64‍ 7,500.

Manufacturing Requirements
Time: 24 hrs
Rush: Platinum64 40
MarketIcon Market Price: Platinum64150 Blueprint2 Blueprint Price: Credits6415,000
Energy Lab Research Requirements
Time: 72 hrs
Prereq: Amprex
LeaderBadgeGhostHolo x1   LeaderBadgeShadowHolo x3   LeaderBadgeStormHolo x10   LeaderBadgeMountainHolo x30   LeaderBadgeMoonHolo x100


This weapon deals primarily Puncture b Puncture damage.


  • High Puncture b Puncture damage on primary fire.
    • Alternate fire has high physical damage on direct impacts with enemies.
  • Primary-fire projectiles are hitscan.
  • Innate punch-through.
  • Able to be thrown to crowd control multiple enemies with a localized field of attraction.
    • Enemies will be dealt 150 Electricity b Electricity when trapped in said field.
      • Will combine with elements on the weapon, but appears to sometimes proc magnetic and/or electric procs regardless of mods.
  • High critical chance and critical damage multiplier.
  • Very ammo efficient.
  • Very short charge time before firing compared to other charged weapons such as bows, equal to the MK1-Paris and bested only by the Javlok and the Rakta Cernos.
  • Comes with a Madurai Pol and Vazarin Pol slot.
  • Killed enemies are vaporized, making it good for Stealth when silenced.


  • Unlike the Javlok, the Ferrox cannot fire with a partial charge.
  • Alternate Fire has slow projectile speed.
  • The weapon fires as soon as it has reached a full charge which can lead to premature firing.
  • Once the Ferrox is thrown, the player will not be able to use it until it is either picked up or when it returns to the player's hands.
  • Alternate fire mode has low damage, attacks slowly, and can not crit.

Weapon LoadoutsEdit


  • The Ferrox's alternate fire throws the weapon itself at the target, and upon landing on a surface arcs of electricity will emit from the Ferrox and chain to any nearby enemies, dealing 150 Electricity b Electricity damage every 5 seconds with a high chance to proc. Enemies under this effect will also be passively dragged towards the Ferrox.
  • The Ferrox will remain at the location where it was thrown for ~20 seconds after landing, automatically teleporting to the player after said duration or until the player manually picks the Ferrox back up for use again.
    • Throwing the weapon does not consume ammo.
  • The Ferrox's alt-fire has a max throwing range of ~50m (though it may be displayed as slightly less due to the forward movement of the player when throwing the weapon).
    • The arc Ferrox will take when thrown is affected by both the angle of the throw as well as how much the throw was charged.
    • Throwing distance can be increased with flight speed modifiers (e.g. Terminal Velocity and Zephyr's Jet Stream Augment).
    • Unlike the Javlok, the Ferrox's alt-fire will not damage its user when thrown too close.
  • If the Ferrox is silenced using Hush, Hushed Invisibility, or Banshee's passive ability, its alt-fire will not alert enemies when dragging and dealing damage to them.
  • Enemies killed by the primary or damage from the secondary attack will vaporize, similar to channeled kills by melee weapons. This makes it very viable for stealth, as long as the weapon is silenced or Hushed Invisibility is used.
    • Keep in mind that there is a long-standing issue with silenced weapons and/or Hushed Invisibility that causes some enemies to not count as stealth kills despite being unalerted when killed. So you will often lose your stealth bonus if trying to use this vaporization feature as a way to level the weapon up through stealth.
  • Fire rate appears to increase the chance for the alt fire to deal damage to tethered enemies, so increasing fire rate will increase the DPS on this fire mode slightly.
    • The damage can be increased by base damage mods like Heavy Caliber or faction-specific damage mods (e.g. Bane of Corpus), increasing the effectiveness of this fire mode.


  • This weapon's decent critical chance and damage multiplier make critical builds using Point Strike and Vital Sense good options.
  • When applying additional elements to the Ferrox, its alt-fire will proc them periodically; as with other weapons with an elemental base, Electricity b Electricity will be applied last if there are two or more other elements modded for, unless an Electricity b Electricity mod is included in the order.
  • Heavy Caliber has a marginal effect on the Ferrox's primary fire even at long range, making it a viable mod for increasing the weapon's damage output.
    • It does affect additional shots when using multishot mods such as Split Chamber.
  • Tactical Reload has an effect while the spear is out after alt-fire is used, so it's possible to do seamless reloads this way.
  • The Ferrox's alt-fire is very useful as a crowd control tool in Survival missions, as its tethering arcs may stun enemies with Electricity b Electricity procs and also pull them together in a close lump.
    • This tethering effect is further amplified on corridors where enemies pass through frequently.
    • This makes grenade-type secondary weapons such as Angstrum and Kulstar or thrown secondaries with Concealed Explosives good choices when using the Ferrox in this manner.
    • This alt-fire will also help squadmates with launcher-type primaries such as Zarr and Tonkor.


  • The bodies of enemies killed by this weapon disintegrate in a manner similar to channeled Melee kills.


Patch HistoryEdit

Hotfix 19.13.1
  • Increased the amount of the Ferrox pull force to prevent enemies from meleeing out of the tether.
  • Fixed Clients being able to throw multiple Javloks and Ferroxs which are then unable to be picked back up.
  • Fixed a script error when throwing the Ferrox.

Update 19.13

  • Added.

See alsoEdit

WeaponsDamageCompare AllCosmetics