Best Weapons in Marathon
Marathon launched with a substantial weapon roster spanning 8 categories (Assault Rifles, Submachine Guns, Light Machine Guns, Pistols, Sniper Rifles, Shotguns, Precision Rifles, Railguns) with more added since launch, each using one of 5 distinct ammo types.
Time-to-kill is very fast in Marathon by design -- even a basic Gray-rarity weapon can kill a fully geared player with enough skill, so loadout choice matters less for raw survivability than knowing how to use what you have.
M77 Assault Rifle is widely cited as the most beginner-friendly pick from beta testing -- comfortable, easy to control, and solid at mid-range with decent close-range performance as a jack-of-all-trades option.
BRRT SMG topped several early beta tier lists for close-range dominance thanks to an extremely high rate of fire.
Weapon rarity (Gray/Standard up through Gold/Prestige) affects available attachments and perks -- higher rarity does not just mean more damage, it can meaningfully change how a weapon functions.
Since this is a full extraction shooter, every weapon you bring into an expedition is at risk of being lost permanently if you do not make it out -- factor your own backpack value into risk tolerance before queuing up.
See the full data: Marathon Weapons