The Kuva Grattler is the Kuva variant of the 
Grattler archgun, with higher critical chance, critical multiplier, status chance, magazine size, and atmospheric damage and faster reload speed. Its 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.
Characteristics
This weapon does primarily 
Puncture damage.
Advantages:
- High
Puncture damage – effective against armor. - Very high critical chance and status chance.
- Above average critical multiplier.
- High accuracy.
- Shots explode in a 9 meter radius upon impact with a surface or enemy.
- Initial hit and explosion apply status separately.
- Innate three Script error: The function "Pol" does not exist. polarities.
- Polarizing the weapon increases its max rank by 2, capping at rank 40 after 5 polarizations, granting the weapon additional mod capacity.
- Comes with an additional bonus Impact, Heat, Cold, Electricity, Toxin, Magnetic, or Radiation damage, based on the Kuva Lich's progenitor Warframe, which increases the listed base damage of the weapon by 25%-60%.
Disadvantages:
- Low Impact and 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.
- Archwing:
- Slowest reload speed of all arch-guns.
- 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.
Comparisons:
- Kuva Grattler (Explosion), compared to Grattler (Explosion):
- Lower base damage per projectile (155.00 vs. 205.00) (excluding any Progenitor bonus)
- Lower Blast damage ( 155 vs. 205)
- Lower
- Higher total damage (using max +60% Progenitor bonus if applicable) (248 vs. 205)
- Higher base critical chance (27.00% vs. 25.00%)
- Higher base critical multiplier (2.10x vs. 2.00x)
- Higher base status chance (27.00% vs. 25.00%)
- Higher average damage per tap (using max +60% Progenitor bonus if applicable) (321.65 vs. 256.25)
- Higher burst DPS (using max +60% Progenitor bonus if applicable) (1785.19 vs. 1601.56)
- Higher sustained DPS (using max +60% Progenitor bonus if applicable) (1220.64 vs. 784.43)
- Lower fire rate (5.550 attacks/sec vs. 6.250 attacks/sec)
- Larger magazine (60 vs. 30)
- More shots per magazine (60 vs. 30)
- Faster spool-up (0 rounds vs. 4 rounds)
- More polarities ( vs. )
- Higher Mastery Rank required (15 vs. 4)
- Lower disposition (●●○○○ (0.70x) vs. ●●●○○ (1.10x))
- Lower base damage per projectile (155.00 vs. 205.00) (excluding any Progenitor bonus)
Acquisition
The 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.
This weapon can be sold for 
7,500.
Notes
- As with all Kuva 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 carrying it has been vanquished.
- The weapon will have a prefix of the name of the Kuva Lich it was acquired from (e.g. Odizrigg Agekk Kuva Grattler).
- 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 Mastery Rank Experience, giving 4,000 points in total.
- 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 Kuva Grattler.
- 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.
- Comes with an additional bonus damage stat, dependent on the Warframe that summoned the Lich.
- This bonus stat ranges between 25%-60% and is randomly generated by the Lich. It can be brought up to its maximum value with Valence Fusion using another copy of this weapon.
Main article: Lich System/Progenitor (edit)
| Element | Progenitor Warframe* |
|---|---|
 Impact
|
 Baruuk •  Dante •  Gauss •  Grendel •  Rhino •  Sevagoth •  Wukong •  Zephyr
|
 Heat
|
 Chroma •  Ember •  Inaros •  Kullervo •  Nezha •  Protea •  Vauban •  Wisp
|
 Cold
|
 Frost •  Gara •  Hildryn •  Revenant •  Styanax •  Titania •  Trinity
|
 Electricity
|
 Banshee •  Caliban •  Excalibur •  Gyre •  Limbo •  Nova •  Valkyr •  Volt
|
 Toxin
|
 Atlas •  Dagath •  Ivara •  Khora •  Nekros •  Nidus •  Oberon •  Saryn
|
 Magnetic
|
 Citrine •  Harrow •  Hydroid •  Lavos •  Mag •  Mesa •  Xaku •  Yareli
|
 Radiation
|
 Ash •  Equinox •  Garuda •  Loki •  Mirage •  Nyx •  Octavia •  Qorvex •  Voruna
|
*Note that the Primed or Umbra version of a Warframe share the same element
Media
Kuva Grattler Skins
Obsidian
PlayStation™ Exclusive
PlayStation™ Exclusive
Patch History
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
- Grattler, the normal counterpart to this weapon.
