At a Workbench, you can choose which weapons you will have equipped, and customise them by adding Attachments. Attachments modify your weapon's Stats, making it more effective or giving it new abilities. The first time you use each new workbench, you'll unlock new Attachments.
When you interact with 24 workbenches you will unlock the "Tinkerer" achievement.
Pistol WorkbenchPistol WorkbenchThis workbench is located in a locked room, which you can get to if you have a key or an explosive charge.
Unlocks: Pistol Magazine Tech.
Pistol WorkbenchUnlocks: Pistol Contraband Crate.
Pistol WorkbenchUnlock: Pistol Rate Of Fire Pack.
Pistol WorkbenchUnlocks: Pistol Suppressor Kit.
In the locked Radio Room (Refinery Armoury Key or Satchel Charge).
Pistol WorkbenchYou will get here through a hole in the roof.
Unlocks: Pistol Recoil Control Crate.
Pistol WorkbenchIn the cave. The entrance to the cave is near the waterfall.
Unlocks: Pistol Stealth Supplies.
Pistol WorkbenchTo open the door inside the church that leads here you will need the Crypt Key or Satchel Charge. But you can also get here through a hole in the roof.
Unlocks: Pistol Power Package.
Rifle WorkbenchYou can get here in two ways. By shooting the padlock on the door or by climbing the vines.
Unlocks: Rifle Rate of Fire Kit.
Rifle WorkbenchThis workbench is located in the basement of the castle.
Unlocks: Rifle Stealth Supplies.
Rifle WorkbenchIn a locked (Pick Lock or Bolt Cutters) room on the upper floor of the building.
Unlocks: Rifle Power Package.
Rifle WorkbenchUnlocks: Rifle Magazine Mods.
Rifle WorkbenchGet to the locked room (Pick Lock or Bolt Cutters) and then use the ladder to go down.
Unlocks: Rifle Mobility Tech.
Rifle WorkbenchIn a room in the tower of the church. You need to climb up the outer wall of the tower there.
Unlocks: Rifle Suppressor Tech.
Rifle WorkbenchUnlocks: Rifle M40 Conversion Case.
Rifle WorkbenchSMG WorkbenchThe workbench is located in the attic. You can get there by climbing the vines. Unlocks: SMG Magazine Mods.
SMG WorkbenchYou can get here by climbing up the walls on the roadside south-east of the workbench marker.
Unlocks: SMG Suppressor Pack.
SMG WorkbenchThe workbench is located on the top floor of the building which you can reach by climbing the vines that grow on the outer walls of the building.
Unlocks: SMG Control Kit.
SMG WorkbenchIn the basement of the building. When you enter the house then you have to crawl under the table and go down the ladder.
Unlocks: SMG Power Cache.
SMG WorkbenchUnlocks: SMG Stealth Supplies.
SMG WorkbenchLocked room (Shipping Armoury Key or Satchel Charge).
Unlocks: SMG Rate Of Fire Kit.
SMG WorkbenchUnlocks: SMG Control Package.
SMG WorkbenchUnlocks: SMG Mobility Package.
Pistol WorkbenchIn the basement, in a locked room (Key or Satchel Charge).
Unlocks: Foxley Suppressor MK2.
Rifle WorkbenchIn the basement of the house. You need Key or Satchel Charge to open the door.
Unlocks: Reduced-Load Magazine.
SMG WorkbenchIn the basement of the house. The front doors are locked (Key or Satchel Charge) but you can get inside through the opening at the back of the house.
Unlocks: M.31 Casket Magazine.
Abandoned Fishing Hut WorkbenchInside the fishing hut.
Unlocks: Assault Case.
Military Fort WorkbenchIn a locked room (Pick Lock or Bolt Cutters).
Unlocks: Close Quarters Pack.
Resort Docks WorkbenchIn the room on the upper floor of the building.
Unlocks: Range Improvement Tech.
Alley WorkbenchIn a room located in the basement of the building.
Unlocks: Close Quarters Pack.
Castle Grounds WorkbenchIn a room on the castle grounds. It is accessible from the courtyard.
Unlocks: Sustained Fire Mods.
Village WorkbenchIn the room on the upper floor of the building.
Unlocks: Assault Case.
Abandoned Cabin WorkbenchUnlocks: Assault Case.
Mine Depot WorkbenchUnlocks: Close Quarters Pack.
Resistance Camp WorkbenchUnlocks: Range Improvement Tech.
Administration WorkbenchUnlocks: Assault Case.
Maintenance WorkbenchUnlocks: Close Quarters Pack.
Resistance Storage WorkbenchUnlocks: Sustained Fire Mods.
