Escape from Tarkov Gunsmith Part 4 Guide – Complete Build & Rewards

In Escape from Tarkov Gunsmith Part 4, players are tasked with modifying the OP-SKS rifle to meet Mechanic’s specifications. This is one of the early quests that pushes players to explore the game’s weapon modding system, trader access, and market value of parts.

This guide breaks down how to complete Escape from Tarkov Gunsmith Part 4, including a full build table, optimal part selections, and a recap of all quest rewards. If you're looking to progress through the Gunsmith series efficiently, this task is a major stepping stone.

How to Complete Escape from Tarkov Gunsmith Part 4

To pass Gunsmith Part 4, you must modify an OP-SKS to meet the following specifications:

• Durability: At least 60
• Ergonomics: 35 or higher
• Recoil Sum: 350 or less
• Sighting Range: Minimum 600
• Weight: 6 kg or less
• Magazine: Minimum 20-round capacity
• Must be equipped with:
  • A scope
  • A silencer

The base OP-SKS rifle cannot meet these stats alone. You’ll need to swap the default wooden stock with a tactical chassis and upgrade its magazine, grip, and optic setup to meet the requirements.

Escape from Tarkov Gunsmith Part 4 – Full Weapon Build

Here’s a full build that meets all of Mechanic’s demands. The following table shows the correct configuration, along with where you can typically obtain each part:

If the suppressor is hard to access early on, you can use a thread adapter (SKS Weapon Tuning 7.62x39 Adapter) to mount an AK-compatible silencer instead.

Tips to Complete Gunsmith Part 4 Efficiently

Here are a few strategies to make sure your build is correct before submission:

1. Double-Check Durability

Your OP-SKS must be 60 durability or higher. Repaired weapons may still be rejected if they fall below this threshold.

2. Unload All Ammo

The gun’s weight must be under 6 kg, and ammo inside the magazine will increase that total. Unload the weapon entirely before turning it in.

3. Use the Preset Menu

Use the "Edit Preset" feature in your stash to test weapon stats like recoil and ergonomics before purchasing parts.

4. Prioritize Flea Market If Needed

If you don’t have high enough trader loyalty, most parts are accessible through the Flea Market. This is the fastest way to complete the quest if you’re in a rush.

5. Remove Unnecessary Attachments

Anything not required (like iron sights) can be removed to reduce weight and help meet the recoil threshold.

Rewards for Completing Escape from Tarkov Gunsmith Part 4

Once you turn in the correct build, here are the rewards you'll receive for Gunsmith Part 4:

• EXP: 3,600
• Mechanic Reputation: +0.01
• Roubles: 25,000
• Items:
  • 2× Gunpowder "Kite"
  • 1× Car Battery
  • 1× Electric Motor
• Unlocks: PP-19-01 Vityaz SMG available for purchase from Mechanic

These resources are valuable early on, especially the car battery and electric motor, which are used in hideout upgrades or can be sold for a decent profit.

Maximize Progress with the Right Build

Escape from Tarkov Gunsmith Part 4 is a great introduction to detailed weapon customization and sets the tone for later, more advanced parts of the questline. Knowing how to manage stats like recoil, ergonomics, and sighting range early on will pay off as you progress.

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