Unlock the full potential of your arsenal in Fortnite Chapter 5 Season 1 by mastering the elusive Weapon Mod Benches. Hidden inside vaults across the island and guarded by powerful bosses, these benches let you customize your weapons with scopes, magazines, grips, and more-if you can find them and claim the keys. Ready to dominate? Here’s where to hunt down every Mod Bench and transform your firepower into a game-winning advantage.
This guide will tell you where to find Weapon Mod Benches (and in turn, Society bosses), how to access the vaults, and how to use Weapon Mod Benches.
How to mod weapons in Fortnite
To mod weapons in Fortnite Chapter 5 Season 1, you first need to locate a Weapon Mod Bench, which are typically found inside vaults near boss spawn locations such as Lavish Lair, Fencing Fields, Grand Glacier, Reckless Railways, and Snooty Steppes. To access these vaults, you must defeat the local boss and obtain their Medallion, which unlocks the vault door. Once inside, you can use Gold Bars to customize your weapons by adding or changing attachments like scopes, magazines, grips, and suppressors. To mod a weapon, simply hold the weapon, interact with the Mod Bench, and select the desired modifications from the available options. Keep in mind that applying mods costs Gold, but removing them is free, allowing you to experiment with different setups to optimize your loadout for battle.
To mod weapons in Fortnite Chapter 5 Season 1, you first need to acquire a Society Medallion, then locate a Weapon Mod Bench.
You’ll find Weapon Mod Benches the same places you’ll find the five Society NPC bosses – which is convenient since this is where you’ll also find Medallions. Here’s where to find their various locations.
Where to find Weapon Mod Benches in Fortnite
Weapon Mod Benches in Fortnite Chapter 5 Season 1 can be found primarily inside Weapon Bunkers scattered across the island, as well as in the basement of the floating Loot Island. These benches are marked on the map to help players locate them more easily. To access some of these benches, players often need to defeat a boss guarding the vault and obtain a special key or medallion. There are nine main Mod Bench locations within Weapon Bunkers, with an additional guaranteed spawn on Loot Island, totaling up to ten possible benches per match. Notable locations include areas near The Underworld, Doomstadt, Reckless Railways, and The Raft. The Loot Island Mod Bench becomes accessible only after the fourth storm circle begins closing, while most others unlock after the third storm circle forms. Players can use these benches to customize their weapons with various mods by spending Gold Bars, enhancing their combat effectiveness during matches.

Like Weapon Cases, Weapon Mod Benches are located in vaults. But these vaults are run by The Society – and that means you’ll need to be carrying a Society Medallion to get inside. There are five Weapon Mod Benches in Fortnite Underground. They’re found in:
- Lavish Lair
- Reckless Railways
- Grand Glacier
- Fencing Fields
- Snooty Steppes
The Society vaults you’re looking for are hidden much better than the Underground’s where you can find Weapon Cases. They’re usually in the basement of one of the large houses.

When you approach the vault door, you’ll be scanned. The door will only open if you’re carrying that location’s boss’ Society Medallion.
Lavish Lair (Oscar) Weapon Mod Bench location

Head to the north side of Lavish Lair and look for the greenhouse (arboretum?) attached to the back of the mansion. On the north side of that, there are some stairs with a tunnel underneath. You’ll find the vault door at the end of the tunnel.
Reckless Railways (Valeria) Weapon Mod Bench location

There’s a villa in the southwest corner of Reckless Railways. Look for the atrium in the center with the fountain. Facing north, there’s a bar in front of some stairs. Go past the bar and down the stairs to find a hallway that leads to the vault.
Grand Glacier (Montague) Weapon Mod Bench location

In the main lobby of the Grand Glacier, face the front desk and the main stairs. Head toward the stairs, but take a left before you get to them – there’s a door on the wall there. Take the hallway right and through the broken wall. The vault will be on your right.
Fencing Fields (Nisha) Weapon Mod Bench location

Enter the largest house in Fencing Fields through the southwest corner. You’ll walk into a kitchen. Take a right, and then walk forward until there are bookcases on your left. Smash the bookcase to reveal a hidden stairway down to the vault.
Snooty Steppes (Peter Griffin) Weapon Mod Bench location

Go through the front door of the mansion and turn right. Just a little down the hall, there will be a stairway on your right. Take it down two flights and the hallway will lead you to another stairway that will take you to the vault.
How to use a Weapon Mod Bench in Fortnite
To use a Weapon Mod Bench in Fortnite, approach the bench and interact with it to access the customization menu for your moddable weapons. You can spend Gold Bars to purchase and apply various weapon mods, including optics, magazines, underbarrel attachments, and barrels, which enhance your weapon’s performance such as improving accuracy, recoil, or ammo capacity. Only weapons with mod slots can be customized, and the changes are immediately visible on your weapon. To access a Mod Bench, you typically need to defeat a Society Boss to obtain a Vault Key that grants entry to the vault where the bench is located. Once inside, loot the area for weapons and then use the bench to tailor your loadout to your playstyle.

Once you’re inside the vault, head for the workbench (it’s usually surrounded by Weapon Cases) to modify your weapons. You can mod the optics, magazine, underbarrel, and barrel. Each modification costs 75 gold bars.
You can install up to four mods on any weapon. The rarity weapons determines how many mods come pre-installed. Uncommon (green) have one, rare (blue) have two, epic (purple) have three, and legendary (gold) have four.
Where are the hidden Weapon Mod Benches in Fortnite Chapter 5 Season 1
In Fortnite Chapter 5 Season 1, hidden Weapon Mod Benches are located inside vaults scattered across the map, each guarded by a powerful boss who holds a key to access the vault. Here are the key locations:
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Lavish Lair: Defeat the boss Oscar, then enter the tunnel under the pond steps behind the mansion to find the vault and Mod Bench inside.
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Fencing Fields: Defeat Nisha to get her vault key, then go to the basement via the outdoor stairs and pass through white and brown doors to reach the vault.
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Grand Glacier Hotel: Defeat Montague, enter the hotel lobby, take the left door and head downstairs to find the vault room.
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Reckless Railways: Defeat Valeria, enter the southeast corner house, descend the spiral staircase to the basement, then take the first left to the vault.
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Snooty Steppes: Defeat Peter Griffin, use his key to enter the mansion, go left through the brown door behind the bar, and find the Mod Bench on the left wall.
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Floating Island: This island appears in the fourth storm phase; enter the basement of the lone house on the island to find the Mod Bench.
To access these benches, players must first defeat the respective bosses to obtain Society Medallions (vault keys). Once inside, the Mod Benches allow customization of weapons with scopes, magazines, grips, and suppressors using Gold Bars.
Are there any secret entrances to the vaults with Mod Benches in Fortnite Chapter 5 Season 1
Yes, several vaults containing Weapon Mod Benches in Fortnite Chapter 5 Season 1 feature secret or less obvious entrances, often requiring players to navigate specific pathways or hidden tunnels after defeating the vault boss and acquiring their medallion:
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Lavish Lair: After defeating Oscar, head to the backyard pond shaped like a plus sign. Under the steps leading down into the backyard, there’s a tunnel that leads directly to the vault-a hidden entrance compared to the main mansion routes.
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Fencing Fields: Once you have Nisha’s medallion, locate the outdoor area with tables and wooden flooring. There’s a staircase leading to the basement; at the bottom, take a left, enter the white door, then continue through the brown door behind the bar to access the vault. This route is less obvious and tucked away from the main building flow.
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Grand Glacier: After defeating Montague, enter the hotel lobby, go through the white door left of the main staircase, then proceed through a broken wall and down the stairs to find the vault room. The entrance is concealed within the building’s lower levels.
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Reckless Railways: With Valeria’s medallion, go to the southeast corner house, find the spiral staircase at the back, and descend to the basement. Take the first left in the hallway to reach the vault, which is hidden from the main station area.
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Snooty Steppes: After defeating Peter Griffin, enter the mansion, turn left, and go through the brown door behind the bar to find the vault on the left wall-a less direct route that can be missed if you don’t know where to look.
These secret or indirect entrances are designed to reward exploration and knowledge of the map, making it easier to reach the Mod Benches if you know the precise paths.
