There is a toolbox in "The Last of Us" that allows players to upgrade weapons. Different weapons have different toolbox quantity requirements. The higher the upgrade, the more toolboxes are required. There are five toolboxes in the game. If you find all five, plus the collected parts, you can Upgraded the weapon to the highest level.
first toolbox
Chapter 4, Inside Bill's Arsenal
«12345»Friendly reminder: Support left and right keyboard keys "←""→" to turn pagessecond toolbox
Chapter 5, inside the rolling shutter door after the Pittsburgh crash
The third toolbox
Chapter 6, behind the power supply to the generator through the pool in the sewer
The fourth toolbox
Chapter 8, inside the scissor door of the university research institute
The above is all the content about the complete toolbox collection of "The Last of Us", I hope it can help everyone. For more game guides, please pay attention to this site.