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This particle cannon generates a condensed beam of super-heated plasma designed to melt rock to ore, and enemies to molten slag.

The Atomos is a Grineer particle cannon, firing a DmgFireSmall64.png Heat-based beam that can chain between multiple enemies.

This weapon can be sold for Credits64.png 2,500; it is also a requisite ingredient for TwinBasolk.png Twin Basolk.


  • This weapon deals DmgFireSmall64.png Heat damage.
  • Damage ramps up from 35% to 100% over 0.6 seconds when firing. After firing stops for 0.8 seconds, the damage decays back to 35% over 2 seconds.
  • Beam can chain up to 3 nearby enemies within 7 meters from the initial target, with each chain doing 75% of the previous chain's damage.
    • Enemy corpses will still allow the beam to connect to nearby enemies.
  • Mod TT 20px.png Magnum Force's accuracy penalty is minimal on this weapon.
  • Innate Vazarin Pol.svg polarity.


  • Normal Attack
    • High magazine
    • Above average effective fire rate
    • High max ammo


  • Main beam has a limited range of 15 meters.
  • Chain beam has a limited range of 7 meters.
  • Poor ammo efficiency.
  • Normal Attack
    • Below average crit chance
    • Low damage
    • Low reload speed
    • Very low disposition
    • Low crit multiplier


The Atomos's blueprint can be purchased from the Market.

Manufacturing Requirements
Time: 24 hrs
Rush: PlatinumLarge.png 45
MarketIcon.png Market Price: PlatinumLarge.png 200 Blueprint2.svg Blueprints Price:CreditsLarge.png30,000


  • When fired at an enemy, the beam will chain to the closest living enemy within 7 meters of the initial target. From there it will chain again, up to a maximum of 3 chains in total. A chain will do 0.75n times the main beam's damage, where n is the chain number. Any enemy caught in the width of the beam will also be damaged. It has a small radius of damage around the beam, similar to the Ignis.png Ignis and Embolist.png Embolist.
    • The damages are : 100% for the main target, 75% for the first in the chain, 56.25% for the 2nd, and 42.1875% for the 3rd.
    • Headshotting the original target does not affect the chain damage.
    • The beam will not chain to a Nullifier through its shield should it connect with a target outside or partially enclosed by it.
    • The beam can also continue to chain to enemies even if targeting a dead enemy or an enemy who is dead but in a dying animation.
  • The Atomos' innate DmgFireSmall64.png Heat element is positioned last when adding elemental damage mods to the weapon.
    • Because of this Heat property and ability to chain, the Atomos is functionally similar to the Corpus TenetCycron.png Tenet Cycron.
  • The Atomos covers up part of the reticle when aiming. This combined with the beams behavior of slowly rotating around a central point means that occasionally the beam will fire behind the weapon with no way of knowing if you are aiming at the enemy or not.
  • Punch Through will cause the main beam to chain independently from each additional target hit, potentially doubling or tripling the total damage output when fired into a crowd. The chain from the target hit after the Punch Through can deal damage to the first target, and vice versa.


  • Mod TT 20px.png Ruinous Extension can be used to extend this weapon's reach, allowing it to hit targets further away.


  • Atomos is the Greek word for "undivided", and is the origin of the word Atom, referring to the smallest constituents of physical matter identifiable as a chemical element.
  • Anastomosis is a Greek word meaning the reconnecting of various streams, such as in blood vessels or river deltas.
  • As of the release of Atomos, it is now possible to have a loadout consisting of purely DmgFireSmall64.png Heat damage, combined with Ignis.png Ignis, Silva&Aegis.png Silva & Aegis (Prime) orTwinBasolk.png Twin Basolk, and ChromaIcon272.png Chroma (Prime) (with the appropriate energy color) or EmberIcon272.png Ember (Prime).
    • Before the release of Atomos, the closest one could get to this effect was with using a Tysis.png Tysis that was heavily modified for DmgFireSmall64.png Heat and Status Chance.
  • Ground-based enemies (e.g. Corpus Crewmen, Infested Chargers etc.) slain by the Atomos will char or appear to be coated in ash, and then disintegrate. Like the Glaxion.png Glaxion's special effects, this effect occurs even if the Atomos is modified to deal a different kind of damage.
  • When reloading, two sections are removed and subsequently replaced individually, unlike other weapons. It can be speculated that one could be fuel and the other an igniting agent or propellant.


  • The Atomos's visual effects will not go through VoltIcon272.png Volt's ElectricShield130xDark.png Electric Shield, but it will interact with the shield normally (critical damage bonus, range boost, etc.)
  • If a Tenno is currently firing the Atomos when they are revived from the downed state, the visual and audio effects of the beam may become stuck at that position and randomly target enemies or even fellow allies for the remainder of the mission. (If stuck to a Tenno it will follow them all the way to extraction, resulting in further eyesore as it clips through the entire map and all terrain to do so.)
    • However the bugged beam does no damage and is purely an aesthetic issue.
  • Sometimes if you reload the magazine for the Atomos, it will not attach to the gun but it will have a full magazine. Just reload the gun to fix this as this does not affect the gun's use.


Patch History[]

Update 30.3 (2021-05-25)

  • Fixed arm cannon type (Atomos) reticle area being blocked by a part of Zephyr Harrier's shoulder element.

Hotfix 30.0.7 (2021-04-22)

  • Added updated wrist-mounted weapon animations (ie Atomos).
    • Also fixes weird wrist angled animations.

Update 29.0 (2020-08-25)

  • Fixed script error with the Atomos.

Update 28.0 (2020-06-11)

Update 23.0 (2018-06-15)

  • Fixed Atomos missing its beam chain FX.

Update 22.14 (2018-03-01)

  • Fixed Beam weapons not being able to damage enemies (alive but in a ragdolled state) when being affected by certain ‘crowd control’ Abilities.
  • Damage now ramps up over 0.6 seconds and after moving off target there is a delay of 0.8 seconds before it starts to decay over 2 seconds.
  • All Beam weapons now start their Damage ramp up at 20% (instead of 10%).
  • The Multishot chance should now apply more consistently with Beam weapons.
  • Weapon Range Mods (like Sinister Reach) no longer affect the distance of chains for chainable Beam weapons (like the Amprex). Main Beam distance is still affected by them.
  • Fixed Beam weapons continuously firing when quick Meleeing.
  • Chain Range increased from 4m to 7m.

Hotfix 22.13.4 (2018-02-22)

  • Increased the Beam weapon Damage ramp up time from 0.8 to 1 second.
  • Fixed Beam weapon Damage ramp up not happening per target.

Hotfix 22.13.3 (2018-02-21)

  • Perfect accuracy and high fire rate is balanced by limited range and damage ramping up from 10% to 100% over 0.8 seconds when firing and decays back to 10% over 1 second after stopping.
  • Mastery Rank increased from 4 to 5.
  • Damage changed from 50 Heat per sec to 29 Heat per tick.
  • Fire Rate increased from 5 to 8.
  • Status Chance increased from 10% per sec to 21% per tick of damage.
  • Critical chance increased from 5% to 15%.
  • Critical Damage increased from 1.5x to 1.7x.
  • Magazine size increased from 50 to 70.
  • Max Ammo increased from 210 to 300.
  • Aimed Zoom reduced from 2.23x to 1.2x.

Hotfix 20.0.8 (2017-03-30)

  • Fixed a rare crash from starting a mission with a beam style weapon.

Update 20.0 (2017-03-24)

  • Fixed performance issues related to the Atomos.

Hotfix 19.7.2 (2017-01-23)

  • Fixed an issue with the Atomos rumble on controllers.

Hotfix 19.6.3 (2017-01-17)

  • Tweaked the Atomos rumbling feedback duration when using a controller.

Update 19.5 (2016-12-22)

  • Atomos' Conclave magazine reduced from 50 to 30.

Update: The Index Preview (2016-10-20)

  • Increased damage of Atomos in Conclave.

Hotfix 18.8.2 (2016-04-13)

  • Decreased the rumble amount on controllers when continuously firing the Atomos.

Update 18.5 (2016-03-04)

  • Fixed the Atomos causing Mag’s Bullet Attractor bubble to turn black when hit.

Update 17.8 (2015-10-21)

  • Fixed the Atomos not properly alerting enemies on use.

Update 17.4 (2015-09-09)

  • Fixed some lingering visual FX from Atomos when used with Mirage’s Hall of Mirrors.

Update 17.0 (2015-07-31)

  • Atomos damage increased in PvP.

Update 16.9 (2015-06-17)

  • Fixed an issue causing Atomos particle effects to hover in mid-air after being fired.

Hotfix 16.5.6 (2015-05-19)

  • Fixed a visual bug related to using the Atomos on certain enemies.

Update 16.5 (2015-05-12)

  • Introduced.

Last updated: Hotfix 24.1.5 (2018-12-13)

See Also[]

  • TwinBasolk.png Twin Basolk, twin hatchets built using the Atomos.
  • Amprex.png Amprex, a Corpus rifle with a functionally equivalent chaining beam.
  • KuvaNukor.png Kuva Nukor, a Kuva Lich sidearm with a functionally equivalent chaining beam.
  • TenetCycron.png Tenet Cycron, a Sister of Parvos sidearm with a functionally equivalent chaining beam.
  • Larkspur.png Larkspur, an Arch-gun with a functionally equivalent chaining beam.