
SPECIAL CODE
13" MFS Echo-Fire Barrel
Barrel
Prestige
Official Maddox RFB Echo-Fire Barrel damage-range adjustments.
Weapons / Assault Rifle
Close range at LV 43: 4 of 5 final · 1 empty until unlocked

Waiting for a verified source.
The official patch notes haven't changed this weapon yet.
We have ready builds for the MADDOX RFB: close range, long range. Pick a style and your weapon level in the lab above and we equip the right parts for that level, with stand-ins until the parts unlock.
The MADDOX RFB maxes out at weapon level 43. After that you can enter weapon prestige and unlock its prestige attachment.
We list 46 compatible attachments for the MADDOX RFB across 8 slots, each with its unlock level and what it does.
The prestige attachment is the 13" MFS Echo-Fire Barrel. It unlocks after you reach max level and enter weapon prestige.
In the same class: AK-27, AN-94, Axion. Each has its own page with level-by-level builds.

SPECIAL CODE
Barrel
Prestige
Official Maddox RFB Echo-Fire Barrel damage-range adjustments.
Barrel
Unlocked at Weapon Level 8.
Short barrel: faster aiming and movement, shorter damage range.
Barrel
Unlocked at Weapon Level 42.
Hybrid barrel: faster bullets and more range, slightly slower aiming.
Barrel
Unlocked at Weapon Level 29.
Damage barrel: more damage per hit, more recoil.
Exact image unavailable — Laser
SPECIAL CODE category presentation — not the exact attachment geometry.
Laser
Unlocked at Weapon Level 28.
Handling laser: faster aiming and sprint-to-fire (visible laser).
Barrel
Unlocked at Weapon Level 2.
Velocity barrel: faster bullets for long fights.
Barrel
Unlocked at Weapon Level 34.
Long barrel: longer damage range, slower aiming.
Exact image unavailable — Laser
SPECIAL CODE category presentation — not the exact attachment geometry.
Laser
Unlocked at Weapon Level 11.
Tactical laser: faster aiming in tactical stance (visible laser).
Exact image unavailable — Laser
SPECIAL CODE category presentation — not the exact attachment geometry.
Laser
Unlocked at Weapon Level 43.
Steady laser: steadier aim while aiming down sights.
Exact image unavailable — Fire Mods
SPECIAL CODE category presentation — not the exact attachment geometry.
Fire Mods
Unlocked at Weapon Level 20.
FMJ rounds: bullet velocity and range.
Exact image unavailable — Fire Mods
SPECIAL CODE category presentation — not the exact attachment geometry.
Fire Mods
Unlocked at Weapon Level 10.
High-velocity ammo: faster bullets and more range.
Exact image unavailable — Laser
SPECIAL CODE category presentation — not the exact attachment geometry.
Laser
Unlocked at Weapon Level 33.
Steady laser: steadier aim while aiming down sights.
Exact image unavailable — Magazine
SPECIAL CODE category presentation — not the exact attachment geometry.
Magazine
Unlocked at Weapon Level 0.
Extended mag: more ammo per magazine, slower handling.
Exact image unavailable — Fire Mods
SPECIAL CODE category presentation — not the exact attachment geometry.
Fire Mods
Unlocked at Weapon Level 24.
Rapid fire: faster fire rate, less range.
Exact image unavailable — Fire Mods
SPECIAL CODE category presentation — not the exact attachment geometry.
Fire Mods
Unlocked at Weapon Level 3.
Recoil springs: less recoil.
Exact image unavailable — Laser
SPECIAL CODE category presentation — not the exact attachment geometry.
Laser
Unlocked at Weapon Level 5.
Steady laser: steadier aim while aiming down sights.
Underbarrel
Unlocked at Weapon Level 0.
Mobile recoil foregrip: faster movement with some recoil control.
Underbarrel
Unlocked at Weapon Level 23.
Steady foregrip: steadier aim and less sway.
Exact image unavailable — Rear Grip
SPECIAL CODE category presentation — not the exact attachment geometry.
Rear Grip
Unlocked at Weapon Level 15.
Quickdraw grip: faster aim-down-sights.
Exact image unavailable — Stock
SPECIAL CODE category presentation — not the exact attachment geometry.
Stock
Unlocked at Weapon Level 14.
Control stock: less recoil, slower handling.
Exact image unavailable — Rear Grip
SPECIAL CODE category presentation — not the exact attachment geometry.
Rear Grip
Unlocked at Weapon Level 0.
Quickdraw grip: faster aim-down-sights.
Exact image unavailable — Rear Grip
SPECIAL CODE category presentation — not the exact attachment geometry.
Rear Grip
Unlocked at Weapon Level 4.
Sprint-to-fire grip: shoot sooner after sprinting.
Underbarrel
Unlocked at Weapon Level 12.
Steady foregrip: steadier aim and less sway.
Exact image unavailable — Rear Grip
SPECIAL CODE category presentation — not the exact attachment geometry.
Rear Grip
Unlocked at Weapon Level 32.
Stabilization grip: less horizontal recoil, slightly slower aiming.

SPECIAL CODE
Muzzle
Unlocked from the Season 4 Battle Pass.
No verified effect summary is published for this attachment.
Underbarrel
Unlocked at Weapon Level 35.
No verified effect summary is published for this attachment.
Underbarrel
Unlocked at Weapon Level 39.
No verified effect summary is published for this attachment.
Underbarrel
Unlocked at Weapon Level 9.
No verified effect summary is published for this attachment.
Underbarrel
Unlocked at Weapon Level 22.
No verified effect summary is published for this attachment.
Exact image unavailable — Magazine
SPECIAL CODE category presentation — not the exact attachment geometry.
Magazine
Unlocked at Weapon Level 21.
Extended mag: more ammo per magazine, slower handling.
Exact image unavailable — Stock
SPECIAL CODE category presentation — not the exact attachment geometry.
Stock
Unlocked at Weapon Level 40.
Flinch stock: less aim flinch when you get hit.
Exact image unavailable — Muzzle
SPECIAL CODE category presentation — not the exact attachment geometry.
Muzzle
Unlocked at Weapon Level 41.
Firepower suppressor: off the minimap, faster bullets and more range, slower aiming.
Exact image unavailable — Magazine
SPECIAL CODE category presentation — not the exact attachment geometry.
Magazine
Unlocked at Weapon Level 16.
Fast mag: faster reload.
Underbarrel
Unlocked at Weapon Level 37.
Mobility foregrip: faster movement.
Exact image unavailable — Muzzle
SPECIAL CODE category presentation — not the exact attachment geometry.
Muzzle
Unlocked at Weapon Level 17.
Compensator: less vertical recoil.

SPECIAL CODE
Muzzle
Unlocked via Weekly Challenge Reward.
Recoil suppressor: off the minimap with less recoil.
Exact image unavailable — Muzzle
SPECIAL CODE category presentation — not the exact attachment geometry.
Muzzle
Unlocked at Weapon Level 30.
Muzzle brake: less gun kick and vertical recoil.
Exact image unavailable — Stock
SPECIAL CODE category presentation — not the exact attachment geometry.
Stock
Unlocked at Weapon Level 0.
Aim-walk stock: faster movement while aiming.
Exact image unavailable — Magazine
SPECIAL CODE category presentation — not the exact attachment geometry.
Magazine
Unlocked at Weapon Level 26.
Flip mag: more ammo and faster reloads.
Exact image unavailable — Muzzle
SPECIAL CODE category presentation — not the exact attachment geometry.
Muzzle
Unlocked at Weapon Level 36.
Mobility muzzle: better hip-fire and movement speed.
Exact image unavailable — Muzzle
SPECIAL CODE category presentation — not the exact attachment geometry.
Muzzle
Unlocked at Weapon Level 7.
Suppressor: keeps your shots off the minimap.

SPECIAL CODE
Underbarrel
Unlocked from the Season 3 Battle Pass.
No verified effect summary is published for this attachment.
Underbarrel
Unlocked at Weapon Level 18.
Recoil foregrip: less recoil.
Exact image unavailable — Rear Grip
SPECIAL CODE category presentation — not the exact attachment geometry.
Rear Grip
Unlocked at Weapon Level 27.
Accuracy grip: less vertical recoil.
Exact image unavailable — Stock
SPECIAL CODE category presentation — not the exact attachment geometry.
Stock
Unlocked at Weapon Level 25.
Tactical stock: better hip-fire and tactical-stance accuracy.
Exact image unavailable — Stock
SPECIAL CODE category presentation — not the exact attachment geometry.
Stock
Unlocked at Weapon Level 6.
Mobility stock: faster movement and sprint.