
Weapon mods are a big part of how weapons come together in Marathon. Mods help shape how a gun handles, how it reloads, how steady it feels, and how it fits into your whole build. Marathon also treats mods as part of its larger buildcrafting system alongside weapons, implants, and cores.
This page is here to make that system easier to understand. If you are trying to figure out what a Chip mod does, which attachment types exist, or how modded weapons are different from their base versions, we have all the information here. Marathon launched with 29 weapons plus mods, and future seasonal updates can keep expanding that pool.
The easiest way to think about Marathon weapon mods is this: chip mods are the most universal part of the system, meaning all weapons can use all chip mods. That said, other mod slots depend on the weapon itself. There are five types of weapon mods available in Marathon right now: Magazines, Barrels, Grips, Optics, Shield, and Generator.
Weapon mods are managed outside of runs. Marathon lets you freely swap weapon mods out of run, and inspecting a weapon opens its mod workbench, which is where you handle changes before heading back in.
Weapon mods are attachments and upgrades that change how a weapon performs in Marathon. They are part of the game’s larger buildcrafting system and can affect handling, control, reload behavior, and other weapon traits.
Weapon mods work through a slot system. Chip mods appear to be the universal slot type, while other slots can include magazines, barrels, grips, optics, and certain weapon-specific parts like generators or shields. Different weapons support different combinations.
Yes. Marathon lets you swap weapon mods, and inspecting a weapon opens the mod workbench so you can make those changes before your next match.
Weapon mods can come from progression rewards and the Armory. There are Standard, Enhanced, and Deluxe Chip Mods in progression caches, and Traxus progression unlocks more mod access through rotating Armory offerings.
The main mod types tied to Marathon weapons include Chip Mods, Magazine Mods, Barrel Mods, Grip Mods, Shield Mods, Generator Mods, and Optic Mods.
Traxus is the faction most closely tied to weapon mods right now. Its progression tracks include unlocks for AR mods, SMG mods, precision mods, volt mods, and chip mods, along with higher-tier mod access later in progression.



