Reconfigured for maximum lethality, this powerful Arch-gun still shatters targets with explosive shells, but now reaches its peak fire-rate instantaneously.

The Kuva Grattler is the Kuva variant of the GrattlerGrnAntiAirGun.png Grattler archgun, with higher critical chance, critical multiplier, and status chance, doubled magazine size, and doubled ammo regeneration in Archwing or Necramech combat, but sacrifices damage and some atmospheric reload speed. It no longer requires spool-up to achieve maximum fire rate, but in turn its base fire rate is slightly lower than a fully spooled normal Grattler.


This weapon does primarily Puncture DamageDmgPunctureSmall64.png Puncture damage.



  • Low Impact DamageDmgImpactSmall64.png Impact and Slash DamageDmgSlashSmall64.png Slash damage – less effective against shields and health.
  • Projectiles have travel time.
  • Explosions inflict self-stagger.
  • Explosion has linear damage falloff from 100% to 30% from central impact.
  • Atmospheric:
    • Linear damage falloff from 100% to ?% from 100m to 350m target distance in atmosphere (distances are affected by Projectile Speed).
    • Projectiles have a maximum range of 350 meters.
    • Poor ammo efficiency, generating high cooldown for the Archgun Deployer for every second fired.



Kuva Grattler is obtained by vanquishing a Kuva Lich who generated with one equipped. After the Lich is vanquished it will be in the player's Foundry ready to claim.

While the weapon itself is not tradeable, a converted Kuva Lich generated with the weapon can be traded to another player. The trade is performed inside a Clan Dojo's Crimson Branch room, and the recipient must not have any active Lich. Once traded, the recipient must fight and vanquish the Lich to claim its weapon.


  • Though the Kuva Grattler deals less damage than the standard Grattler, an elemental bonus of at least 32.3% will bring the Kuva Grattler's damage above that of its counterpart.
  • As with all Kuva and Tenet weapons, the player does not have to meet the Mastery Rank displayed to obtain this weapon. It can simply be claimed from the foundry after the Kuva Lich or Sister carrying it has been vanquished.
  • The weapon will have a prefix of the name of the Lich/Sister it was acquired from (e.g. Odizrigg Agekk Kuva Kohm).
  • The weapon's max rank caps at 40 after 5 polarizations (max rank increases by 2 per Forma added).
    • Additional polarizations can be added when the weapon reaches its new max rank at that polarization level.
    • Each additional rank also gives 100 Mastery Rank experience, giving 4,000 points in total at level 40.
    • Mod capacity scales with the additional ranks, and can reach a total of 80 at rank 40 with an Orokin Catalyst installed.
      • Without an Orokin Catalyst, the max is 40. Combined with the five polarized mod slots required to reach that point, an Orokin Catalyst might not be required to finish modding the weapon.
      • After polarizing a weapon, any additional mod capacity above 30 (60 with an Orokin Catalyst) will not take effect until the weapon's rank reaches 31 and above.
        • Legendary Mastery Rank increases the minimum mod capacity for such weapons, without the weapon needing to be rank 31 and above. For example, Legendary 1 increases the minimum capacity to 31 (62 with an Orokin Catalyst).
  • Comes with an additional bonus damage stat, dependent on the Warframe that summoned the Lich/Sister.
Element Progenitor Warframe*
Impact DamageDmgImpactSmall64.png Impact BaruukBaruukIcon272.png BaruukGaussGaussIcon272.png GaussGrendelGrendelIcon272.png GrendelRhinoRhinoIcon272.png RhinoSevagothSevagothIcon272.png SevagothWukongWukongIcon272.png WukongZephyrZephyrIcon272.png Zephyr
Heat DamageDmgHeatSmall64.png Heat ChromaChromaIcon272.png ChromaEmberEmberIcon272.png EmberInarosInarosIcon272.png InarosNezhaNezhaIcon272.png NezhaProteaProteaIcon272.png ProteaVaubanVaubanIcon272.png VaubanWispWispIcon272.png Wisp
Cold DamageDmgColdSmall64.png Cold FrostFrostIcon272.png FrostGaraGaraIcon272.png GaraHildrynHildrynIcon272.png HildrynRevenantRevenantIcon272.png RevenantTitaniaTitaniaIcon272.png TitaniaTrinityTrinityIcon272.png Trinity
Electricity DamageDmgElectricitySmall64.png Electricity BansheeBansheeIcon272.png BansheeExcaliburExcaliburIcon272.png ExcaliburLimboLimboIcon272.png LimboNovaNovaIcon272.png NovaValkyrValkyrIcon272.png ValkyrVoltVoltIcon272.png Volt
Toxin DamageDmgToxinSmall64.png Toxin AtlasAtlasIcon272.png AtlasIvaraIvaraIcon272.png IvaraKhoraKhoraIcon272.png KhoraNekrosNekrosIcon272.png NekrosNidusNidusIcon272.png NidusOberonOberonIcon272.png OberonSarynSarynIcon272.png Saryn
Magnetic DamageDmgMagneticSmall64.png Magnetic HarrowHarrowIcon272.png HarrowHydroidHydroidIcon272.png HydroidLavosLavosIcon272.png LavosMagMagIcon272.png MagMesaMesaIcon272.png MesaXakuXakuIcon272.png XakuYareliYareliIcon272.png Yareli
Radiation DamageDmgRadiationSmall64.png Radiation AshAshIcon272.png AshEquinoxEquinoxIcon272.png EquinoxGarudaGarudaIcon272.png GarudaLokiLokiIcon272.png LokiMirageMirageIcon272.png MirageNyxNyxIcon272.png NyxOctaviaOctaviaIcon272.png Octavia

*Note that the Primed and Umbra versions of a Warframe share the same element (including altered, exalted, spectral or enhanced forms such as Atlas using Rumbled, Titania in Razorwing, or Sevagoth's Shadow).


  • In Archwing mode the Kuva Grattler has a 2.1 critical multiplier compared to the normal Grattler's 2.0 multiplier, however in Heavy Weapon/Mech mode it has the same 2.0x critical multiplier as the Grattler.


Kuva Grattler Skins Edit

Patch History[]

Hotfix 30.5.4 (2021-07-17)

  • Normalized the Kuva Grattler Arch Gun stats with Heavy Weapon as intended and exposed said stats in the Arsenal:
    • Impact Damage from 100 to 50
    • Area-of-effect Damage from 205 to 155

Hotfix 30.5.1 (2021-07-06)

  • Fixed duplicate instances of Kuva Grattler in Profile and Codex.

Update 30.5 (2021-07-06)

  • Introduced.

See Also[]