This article explains the Gunsmith feature in Arena Breakout. It covers how to use the Gunsmith in Arena Breakout and what you can do with it, so please use it as a reference.
Table of Contents
What is Gunsmith?
Gun Customization Feature

By opening Gunsmith, you can customize any gun. Note that you cannot use the Gunsmith feature unless you have previously obtained the gun.
You Can Save Customizations

While you can customize guns from your inventory, Gunsmith allows you to save your favorite customizations. Since the usability of a gun changes significantly depending on its stats, save your favorite customizations so you can build them quickly.
How to Use Gunsmith
Select a Gun

First, select the gun you want to customize. Since you will need to purchase any parts you don't own, including the gun itself, it's recommended to choose guns you already have in your inventory or inexpensive ones in the early game.
Customize Each Part

Decide which parts to use for each section. Proceed with customization while checking the stats and considering the price.
Stats to Prioritize
Stats | Description |
Recoil Control (Vertical) | Reduces vertical recoil |
Recoil Control (Horizontal) | Reduces horizontal recoil |
Ergonomics | Increases ADS speed |
It is generally recommended to adjust these three types of stats to be as high as possible.
Select the Gun to Use for Assembly

If you have the gun you want to customize, select it and proceed to the purchase screen for missing parts. If you don't have the gun, or if you have it but want to keep it as is, purchase the gun body along with the parts.
Purchase Parts

Purchase the missing parts. You can also customize without certain parts by unchecking them, so don't forget to check the price for final confirmation.
Save the Build

You can save the build by selecting "Save" in the upper left of the customization screen or by completing the customization. You can also freely name the build, so save your favorite builds with easy-to-understand names.
Load a Build

By tapping "Weapon Builds" in the upper left of the customization screen, you can select a saved build and assemble it immediately.
My Builds

Default builds and builds you have created yourself are saved here.
Pro Builds

These are recommended builds provided by the game from the start. If you're not used to it, use these builds as a reference for customization, or try assembling them to test their feel.