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The Omolon Cocytus SR4 will drown your enemies in a river of pain.
― In-game description

Cocytus SR4 is a legendary scout rifle. It can be dismantled to generate Glimmer, Weapon Parts, and Legendary Marks.

Sources[]

Cocytus SR4 can be retrieved from one of the following activities/vendors:

The Taken King source icon The Taken King
This item requires the Taken King expansion.
Gunsmith source icon Gunsmith
Banshee-44, the Gunsmith, sometimes sells this item in the Tower. You may also need to gain reputation with him to unlock this item.

Upgrades[]

Cocytus SR4 can also be upgraded with the following perks:

Column 0[]

Kinetic Damage perk icon Kinetic Damage
This weapon causes kinetic damage.
Infuse perk icon Infuse
Consume a more powerful Weapon to boost the Attack value of this Weapon.

Column 1[]

Random perk icon Randomly Selected Perk
This could be one of two randomly selected perks.
Candle IS2 perk icon Candle IS2
Minimal iron sights.

Improves weapon handling.

Spark IS6 perk icon Spark IS6
Omolon holo sights.

Improves weapon handling.

Random perk icon Randomly Selected Perk
This could be one of two randomly selected perks.
Torch HS2 perk icon Torch HS2
Omolon close quarters combat sights.

CQ optics, improved target acquisition.

Torch HS2 perk icon Flash HS4
Omolon imaging technology.

Highlights enemy targets.

Random perk icon Randomly Selected Perk
This could be one of two randomly selected perks.
Torch HS2 perk icon Impulse MS2
Ranged combat scope.

Improved optics and range.

Torch HS2 perk icon Signal MS5
Omolon imaging technology.

Highlights long-distance enemy targets at optimal combat range.

Column 2[]

Random perk icon Randomly Selected Perk
This could be one of five randomly selected perks.
Triple Tap perk icon Triple Tap
Rapidly landing precision hits will return one round to the magazine.
Icarus perk icon Icarus
Improved accuracy while airborne.
Replenish perk icon Replenish
This weapon's magazine will be refilled whenever you unleash your Super.
Rescue Mag perk icon Rescue Mag
Chance to refill this weapon's magazine when critically wounded.
Life Support perk icon Life Support
Kills with this weapon while critically wounded have a chance to start regenerating health.

Column 3[]

Random perk icon Randomly Selected Perk
This could be one of five randomly selected perks.
Snapshot perk icon Snapshot
Aiming this weapon is incredibly fast.
Quickdraw perk icon Quickdraw
This weapon can be drawn unbelievably fast.
Single Point Sling perk icon Single Point Sling
Switch weapons faster. Move quicker while aiming.
Extended Mag perk icon Extended Mag
A larger magazine.
Lightweight perk icon Lightweight
When held, this weapon grants +2 character Agility.
Random perk icon Randomly Selected Perk
This could be one of five randomly selected perks.
Hand-laid Stock perk icon Hand-laid Stock
Increased Stability

Reduced Range

Injection Mold perk icon Feather Mag
Faster Reload

Reduced Magazine Size

Rifled Barrel perk icon Rifled Barrel
Increased Range

Slower Reload

Casket Mag perk icon Casket Mag
Increased Magazine Size

Reduced Stability

Smallbore perk icon Smallbore
Increased Range and Stability

Slower Reload, Reduced Magazine Size

Column 4[]

Random perk icon Randomly Selected Perk
This could be one of five randomly selected perks.
Grenadier perk icon Grenadier
Kills with this weapon reduce the cooldown of your grenade.
Army of One perk icon Army of One
Quick unassisted kills with this weapon reduce grenade and melee cooldown.
Firefly perk icon Firefly
Precision kills with this weapon cause the target to explode.
Third Eye perk icon Third Eye
Radar stays active while aiming down this weapon's sights.
Zen Moment perk icon Zen Moment
Causing damage with this weapon increases its stability.
Random perk icon Randomly Selected Perk
This could be one of five randomly selected perks.
Underdog perk icon Underdog
This weapon gains a boost to range and handling when health is low.
Eye of the Storm perk icon Eye of the Storm
This weapon becomes more accurate as your health gets lower.
Exhumed perk icon Exhumed
This weapon gains improved range and handling for a short time after revival.
Surrounded perk icon Surrounded
This weapon gains bonus damage when three or more enemies are in close proximity.
Danger Close perk icon Danger Close
This weapon gains increased reload and handling when two or more enemies are in close proximity.

References[]

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