Marathon Mods
Every weapon mod in Marathon, grouped by slot. Effects, rarity tiers, and credit cost — straight from the game data. Many mods come in a rarity ladder: the same mod gets stronger as the rarity rises.
Utility effects - economy, ammo, healing, and situational perks.
Afterburner
EnhancedSliding with this weapon reloads a portion of your magazine and increases stability and accuracy by a moderate amount. Ballistic weapons reload from reserves. Volt weapons reload a smaller portion69cr
Alarmist Chip
SuperiorAfter aiming down sights for a brief duration, projectile impacts create a scan-drone alert.
Alternating Current
DeluxeRestore a significant amount of health or shields when damaging a target affected by an effect.207cr
Background Process2 RARITIES
StandardWhen this weapon is stowed, it automatically reloads after a significant period of time.23cr
EnhancedWhen this weapon is stowed, it automatically reloads after a significant period of time.23cr
Battle Runner
EnhancedEliminations with this weapon grant increased sprint speed for a moderate duration.69cr
Bits Per Second
EnhancedRapid precision hits temporarily increase stability and reload speed by a moderate amount.69cr
Blue Blood
SuperiorDowning a hostile Runner restores health.621cr
Bounty Hunter3 RARITIES
StandardEliminating UESC pays you a few credits.23cr
EnhancedEliminating UESC pays you a small amount of credits.69cr
DeluxeEliminating UESC pays you a considerable amount of credits.207cr
Brain Freeze Chip
SuperiorPrecision downs and kills with this weapon create a small explosion that spreads Frost to nearby hostiles.
Buffer Overflow Chip
SuperiorPrecision downs and kills with this weapon grant a stacking increase to reload speed. Stacks and benefit scale with rarity tier.
Chaos Theory2 RARITIES
StandardDealing a significant amount of sustained damage causes hostiles to drop a random item.23cr
EnhancedDealing a moderate amount of sustained damage causes hostiles to drop random ammo.69cr
Circuit Tracers
SuperiorEliminations with this weapon reload the magazine by a massive amount.621cr
Cloudborn2 RARITIES
StandardWhile in smoke, this weapon has increased stability, accuracy, handling, and movement speed.23cr
EnhancedWhile in smoke, this weapon has increased stability, accuracy, handling, and movement speed.23cr
Endless Runner
StandardEffect not documented yet.23cr
Exterminator Chip
SuperiorThis weapon deals increased damage against the terrors of [REDACTED] (the new Dire Marsh (Night) threat).
Eyes on Fire2 RARITIES
StandardQuickly after deactivation of a tactical or trait ability, eliminating a hostile grants a moderate effect.23cr
EnhancedAfter deactivation of a tactical or trait ability, eliminating a hostile within a brief window grants a moderate amount of tactical and trait ability energy.
Five Finger Discount
EnhancedEliminating UESC or downing Runners with a melee or knife attack partially reloads this weapon.69cr
Flash Draw Chip
SuperiorRestore health or shields when damaging a target affected by EMP.540cr
Ghillie Suit Chip
SuperiorAfter crouching for a short duration, this weapon has increased stability, range, and accuracy.
Heatsink2 RARITIES
StandardDealing sustained damage with this weapon reduces your generated heat by a small amount.23cr
EnhancedReduces weapon heat buildup rate, delaying overheat on sustained fire.60cr
Insomniac2 RARITIES
EnhancedSustained fire gradually increases damage output over several seconds.
SuperiorWhile under the effects of Energy Amp, eliminating hostiles with this weapon extends the effect.621cr
Insurance Plan2 RARITIES
StandardWhile under the effects of a Mechanic's Kit or OS Debug, defeating a hostile significantly aids you.23cr
DeluxeWhile under the effects of a Mechanic's Kit or OS Debug, defeating a hostile significantly aids you.207cr
Insurrection3 RARITIES
StandardThis weapon deals slightly increased damage against UESC forces.23cr
DeluxeThis weapon deals considerably increased damage against UESC forces.23cr
SuperiorThe weapon deals significantly increased damage against UESC forces.621cr
Keen Scout Chip
EnhancedSlightly increases target detection range and enemy highlight duration.60cr
Keyboard Warrior
EnhancedEliminations grant stacks of bonus accuracy and range for a moderate duration.69cr
Last Resort2 RARITIES
EnhancedWhile you are Overheated, non-precision damage is increased by a moderate amount.69cr
SuperiorWhile you are Overheated, non-precision damage is increased by a massive amount.621cr
Motionsense Chip
EnhancedAlerts you when enemies are moving nearby, briefly highlighting their position.60cr
Opportunist
StandardWhile shields are depleted, shots on hostile targets have a small chance to return ammo to the magazine.23cr
Optimal Prime2 RARITIES
StandardDealing damage quickly after your prime ability ends grants you the effects of Energy Amp.23cr
EnhancedDealing damage quickly after your prime ability ends grants you the effects of Energy Amp.69cr
Ornithologist3 RARITIES
StandardAfter aiming down sights for a brief duration, projectile impacts create a distracting bird call.23cr
EnhancedAfter aiming down sights for a brief duration, projectile impacts create a distracting bird call.69cr
SuperiorAfter aiming down sights for a brief duration, projectile impacts from this weapon create a distracting bird call.621cr
Punishment
SuperiorThis weapon deals significantly increased damage against Sph't combatants.621cr
Refocuser Chip
SuperiorTaking explosive damage grants this weapon increased ADS speed and aim assist.
Reverse Card
SuperiorWhile below half health, breaking the shield of a hostile Runner restores your shields.621cr
Rocket Start2 RARITIES
StandardEliminating a hostile shortly after sprinting grants you the effects of Cardio Kick for a short time.23cr
SuperiorEliminating a hostile shortly after sprinting grants you the affects of Cardio Kick for a long duration.621cr
Rorschach Test
SuperiorWhile surrounded by hostiles, reloading this weapon overflows the magazine, with improved overflow for ballistic weapons. Additionally, grants a bonus to stability and aim assist for a short duration after activation.621cr
Scrapyard Chip
SuperiorDefeating hostiles with this weapon has a chance to spawn depleted health items or standard materials. Chance increases with rarity tier.
See Ya
SuperiorReloading this weapon when the magazine is empty causes you to become briefly invisible.621cr
Slip Protocol2 RARITIES
StandardWhile moving, this weapon's stability and accuracy increased.12cr
SuperiorWhile moving, this weapon's stability and accuracy increase by a massive amount.621cr
Stack Overflow3 RARITIES
StandardReloading this weapon when the magazine is empty overflows the magazine by a small amount.35cr
DeluxeEach consecutive hit on the same target increases damage slightly, stacking up to 5 times.
SuperiorReloading this weapon when the magazine is empty overflows the magazine by a massive amount.621cr
Sucker Punch2 RARITIES
StandardSlightly increases the damage of your next melee attack after dealing damage with this weapon.23cr
EnhancedModerately increases the damage of your next melee attack after dealing damage with this weapon.69cr
Swarm Directive2 RARITIES
DeluxeHitting multiple enemies in quick succession temporarily increases fire rate.
SuperiorPrecision eliminations with this weapon spawn a large amount of flechette seekers that heal allies.621cr
Testament
SuperiorAiming down sights for a short duration increases this weapon's range and aim assist.621cr
Torch Bug3 RARITIES
StandardEliminating a hostile causes them to explode.23cr
DeluxeKills with this weapon leave a brief fire patch that damages enemies who walk through it.
SuperiorItem slightly improves the reload time of all weapons.621cr
Trigger Discipline2 RARITIES
StandardGrants a small amount of increased accuracy for the first few rounds of a trigger pull.23cr
EnhancedGrants a moderate amount of increased accuracy for the first few rounds of a trigger pull.69cr
Urgent Care Chip
SuperiorKills or downs with this weapon while missing health grant a stacking bonus to Self-Repair speed until you return to full health. Scales with rarity tier.
Reload speed, magazine size, and ammo handling.
Adaptive Mag
PrestigeIncreases reload speed and magazine size. Allows toggle burst-fire mode. Body shots increase precision and aim assist for a short time.2000cr
Adrenal Feedback
PrestigeA custom-made mod for the Hardline PR. Increases magazine size.1620cr
Air-Cooled Chamber2 RARITIES
EnhancedSlightly increases reload speed and magazine size.20cr
SuperiorGreatly increases reload speed and magazine speed.621cr
BFM
EnhancedIncreases magazine size60cr
Balanced Mag
EnhancedSlightly increases magazine size and reload speed.
Cloudfeather Chamber
EnhancedSlightly increases magazine size and reload speed.20cr
Combat Mag3 RARITIES
StandardStandard combat magazine for ballistic weapons.30cr
EnhancedSlightly increases magazine size, reload speed and range.60cr
SuperiorStandard combat magazine for ballistic weapons.621cr
Drum Magazine2 RARITIES
DeluxeGreatly increases magazine size.234cr
SuperiorGreatly increases magazine capacity. Noticeably increases reload time.540cr
Extended Magazine
DeluxeIncreases magazine capacity by a moderate amount. Slightly increases reload time.180cr
Fast Magazine
EnhancedSlightly decreases reload time at the cost of a small reduction in magazine size.60cr
Feather Mag3 RARITIES
EnhancedEffect not documented yet.23cr
DeluxeIncreases magazine size and reload speed.207cr
SuperiorGreatly increases reload speed and magazine size.600cr
Hi-Cap Mag2 RARITIES
DeluxeGreatly increases magazine size.209cr
SuperiorMassively increases magazine size.702cr
Hi-Speed Mag
SuperiorGreatly increases reload speed and magazine size.378cr
Hi-Velocity Payload
SuperiorGreatly increases magazine size and reload speed.600cr
Hollow-Case Rounds2 RARITIES
EnhancedIncrease magazine size, reload speed, and range.60cr
DeluxeIncreases magazine size, reload speed, and range.207cr
Impact Shockwave
PrestigeA custom-made mod for the Ares RG. Increases range and magazine size.1620cr
Infinity Belt
PrestigeA custom-made mod for the Conquest LMG. Increases reload speed and magazine capacity.1620cr
Interval Mag
PrestigeA custom-made mod for the M77 Assault Rifle. Increases range, magazine size, and reload speed.1620cr
Kingmaker Mag
PrestigeIncreases reload speed and magazine size. Headshots increase rate of fire. Stacks up to three times.2000cr
Maga Drive
EnhancedIncreases magazine size.70cr
Overclocked Delimiter
PrestigeIncreases magazine size and reload speed. Adds a third level of charge. When fully charged, this weapon has greatly reduced spread, increased damage, and its projectiles ricochet and pierce hostiles.2000cr
Reloader Mag2 RARITIES
EnhancedSlightly increases reload speed and magazine size.60cr
DeluxeIncreases reload speed and magazine size.207cr
Rodeo Mag
PrestigeA custom-made mod for the Bully SMG. Increases rate of fire, stability, and magazine size.1620cr
Slick Mag 1
EnhancedSlightly increases rate of fire and magazine size.60cr
Stabilizing Mag
DeluxeIncreases magazine size and stability.209cr
Steady Mag
EnhancedEffect not documented yet.60cr
Steady Rounds
DeluxeIncreases stability and magazine size.200cr
Stopping Mag
PrestigeA custom-made mod for the Impact HAR. Increases magazine size and reload speed.1620cr
Surplus Magazine
EnhancedSlightly increases magazine capacity with no handling penalty.60cr
Tactical Reload Mag
DeluxeSignificantly reduces reload time. Magazine capacity is unchanged.180cr
Tapered Heatsink
DeluxeEffect not documented yet.200cr
Thermal Surge Battery
PrestigeA custom-made mod for the V11 Punch. Increases reload speed and magazine size.1620cr
Turbo Belt
EnhancedSlightly increases magazine size, reload speed, and movement speed.60cr
Turbo Chamber
DeluxeIncreases reload speed and magazine size.100cr
Accuracy, stability, range, and aim assist.
Accu-point Dampener2 RARITIES
EnhancedSlightly Increases aim assist23cr
DeluxeIncreases aim assist.100cr
Compact Barrel
EnhancedReduces weapon length for improved handling and ADS speed.60cr
Extended Barrel
DeluxeIncreases effective range and projectile velocity at the cost of handling speed.180cr
Farshot Barrel3 RARITIES
EnhancedEffect not documented yet.23cr
DeluxeIncreases ADS accuracy and range.100cr
SuperiorGreatly increases ADS accuracy and range.540cr
Flechette Split Action
PrestigeA custom-made mod for the BRRT SMG. Increases stability, handling, and accuracy when firing from the hip.1620cr
Hi-Focus Dampener
EnhancedSlightly increases ADS accuracy.60cr
Hipshot Dampener
EnhancedSlightly increases hip-fire accuracy and stability.23cr
Impulse Brake
DeluxeIncreases ADS accuracy and aim assist.180cr
Ironhold Barrel2 RARITIES
EnhancedSlightly increases stability.60cr
SuperiorGreatly increases stability, ready speed, and accuracy while crouched.540cr
Lockout Muzzle Brake
PrestigeA custom-made mod for the BR33 Volley Rifle. Increases movement speed with this weapon.1620cr
Long-Range Barrel
DeluxeIncreases range and accuracy when firing from the hip.180cr
MIPS Slug Converter
PrestigeA custom-made mod for the WSTR Combat Shotgun. Increases rate of fire, stability, and aim.1620cr
Nano-Suppressor
EnhancedSlightly increases accuracy when firing from the hip. Suppressor silences this weapon's shots and scrambles targets' health display.69cr
Outland Suppressor
PrestigeA unique mod for the Outland. Increases stability and range.1620cr
Overcharge Lens
PrestigeEnhances energy weapon performance, increasing charge efficiency and projectile velocity.60cr
Pinpoint Barrel
SuperiorGreatly increases stability and range.750cr
Precision Barrel2 RARITIES
EnhancedSlightly increases ADS accuracy and range.60cr
DeluxeImproves accuracy and reduces bullet spread for more consistent shots.100cr
Quickfire Barrel2 RARITIES
EnhancedSlightly increases stability and draw speed.23cr
DeluxeIncreases stability100cr
Sonar Shot
PrestigeA custom-made mod for the V66 Lookout. Greatly increases range and stability.1620cr
Steady Barrel2 RARITIES
DeluxeIncreases stability, ready speed, and accuracy while moving.180cr
SuperiorGreatly increases stability, ready speed, and accuracy while moving.540cr
Suppression Dampener
EnhancedSlightly increases ADS accuracy.69cr
Suppression Muzzle
PrestigeSuppresses weapon fire, reducing sound signature and muzzle flash.1600cr
Triple Barrel
PrestigeA custom-made mod for the Copperhead RF. Increases movement speed with this weapon.1620cr
Tru-shot Barrel
EnhancedSlightly improves shot accuracy.60cr
Weighted Barrel2 RARITIES
EnhancedSlightly increases aim assist.60cr
SuperiorGreatly increases aim assist and accuracy while moving.
Sights, zoom, and target acquisition.
Charge-coupled Optic
PrestigeCharge rate is increased while aiming at target.1200cr
Cold Vigilance Scope
EnhancedSlightly increases zoom, ADS speed, and ADS accuracy.60cr
Far Reach Optic2 RARITIES
DeluxeIncreases zoom and ADS accuracy.200cr
SuperiorGreatly increases zoom and ADS accuracy.621cr
Hi-Zoom Optic
SuperiorGreatly increases zoom, range, and ADS accuracy.621cr
Holo Sight
DeluxeAdds a holographic sight with a wider field of view. Improves target tracking in ADS.180cr
Iron Focus Optic
EnhancedLow-profile optic that improves ADS accuracy without increasing magnification.60cr
Lever Overhaul Interface
Prestigeshots on target to increase fire rate. This degrades when a shot misses.2000cr
Long Eye Scope
SuperiorAdds a 4x magnification scope. Greatly improves precision at long range.540cr
Midsight Optic2 RARITIES
EnhancedEffect not documented yet.60cr
DeluxeIncreases zoom and ADS accuracy.180cr
Neuro Optic Lens
EnhancedSlightly increases zoom and ADS speed.60cr
Optic 1.4XI
EnhancedSlightly increases zoom, ADS accuracy and accuracy while moving.60cr
Oracle Lens
SuperiorGreatly increases ADS speed, accuracy while moving and ADS accuracy.600cr
Pistol Scope
PrestigeGreatly increases ADS speed. Activates a specialized high zoom optic. Precision hits with this weapon restore a small amount of shields.2000cr
Q-Tap Regen Optic
PrestigeA custom-made mod for the Twin Tap HBR. Increases rounds per burst to four.1620cr
Rangefinder Lens
EnhancedEffect not documented yet.51cr
Rangefinder Optic3 RARITIES
EnhancedSlightly increases zoom, ADS accuracy and accuracy while moving.60cr
DeluxeIncreases zoom, ADS accuracy while moving.200cr
SuperiorGreatly increases zoom, ADS accuracy, and accuracy while moving.
Reflex Sight
EnhancedAdds a close-range red dot sight. Slightly improves ADS target acquisition.60cr
SP Scope II
DeluxeIncreases zoom and ADS accuracy.204cr
Scout Scope
DeluxeAdds a 2x magnification scope for medium-range engagements.180cr
Shortwave Scout Optic
DeluxeThe sight highlights hostile heat signatures.200cr
Thermal Optic
DeluxeThermal sight that highlights hostile heat signatures. Deluxe: increases zoom and ADS accuracy (-0.08° ADS Spread, +0.4x Zoom). Superior: decreases ADS speed but increases ADS accuracy and accuracy while moving (-20 ADS Speed, +60 ADS Accuracy, +60 Moving Accuracy).200cr
Twinscope Optic
EnhancedSlightly increases zoom, ADS speed, and accuracy.60cr
Vigilant Lens2 RARITIES
EnhancedSlightly increases zoom, ADS speed, and ADS accuracy.60cr
SuperiorGreatly increases zoom, ADS Speed, and ADS accuracy.459cr
Vital Intel
PrestigeGreatly increases handling and ADS speed. Enables proximity sensor on radar. When hostiles are nearby, this weapon has increased handling and accuracy.1620cr
ADS speed, ready speed, and handling.
Combat Grip2 RARITIES
EnhancedEffect not documented yet.60cr
DeluxeIncreases ADS Speed and ready speed.180cr
Ergonomic Grip
EnhancedSlightly improves handling and reduces recoil on the first few shots of a burst.60cr
Full-Auto Selector
PrestigeA custom-made mod for the Misriah 2442. Increases the rate of fire.1620cr
Guarded Grip
DeluxeIncreases ready speed and stability.180cr
Precision Grip
SuperiorGreatly improves ADS stability and reduces vertical recoil.540cr
Snapshot Grip2 RARITIES
EnhancedSlightly increases while moving and ADS speed.23cr
DeluxeIncreases accuracy while moving and ADS speed.180cr
Speed Scout Grip2 RARITIES
EnhancedSlightly increases ADS speed and accuracy.60cr
DeluxeIncreases ADS speed and accuracy.180cr
Sturdy Brace Grip
EnhancedIncreases Stability.60cr
Vigilant Grip
EnhancedSlightly increases ready speed and stability.23cr
Weighted Grip
DeluxeModerately reduces recoil and increases stability during sustained fire.180cr
Stability and ready-up speed for the weapon.
Balanced Shield2 RARITIES
EnhancedSlightly increases ready-up speed and movement with this weapon.69cr
DeluxeIncreases ready speed and movement speed.200cr
Ballistic Shield
EnhancedDeploys a small frontal shield while deployed. Slightly reduces movement speed.60cr
Circuit Shield
PrestigeA custom-made mod for the Retaliator LMG. Increases the stability.1620cr
Control Shield2 RARITIES
EnhancedSlightly increases stability.69cr
SuperiorGreatly Increases stability.600cr
Duelist Shield
EnhancedSlightly increases accuracy while moving and ADS speed.60cr
Fortress Shield
SuperiorGreatly increases shield durability and adds a small HP regen when shield is active.540cr
Overclocked Shield
PrestigeA custom-made mod for the Demolition HMG. Increases stability and movement speed.1620cr
Reactive Shield
DeluxeShield absorbs a moderate amount of incoming damage before breaking.180cr
Generator
5Energy-weapon output and heat behaviour.
Overcharge Cell
DeluxeModerately increases energy charge capacity and charge rate.180cr
Overclocked Generator
PrestigeFires a 2-shot burst with pinpoint accuracy.1200cr
Power Cell
EnhancedSlightly increases energy weapon charge capacity.60cr
Surge Capacitor
SuperiorGreatly increases energy charge capacity. Charge shots deal significantly increased damage.540cr
Turbo Generator
EnhancedSlightly increases ADS speed and charge time.70cr