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In Escape from Tarkov, Gunsmith Part 21 is one of the more complex and demanding quests issued by Mechanic. This task involves modifying not just one, but two weapons—the Remington Model 700 and the Colt M1911—to meet highly specific standards. In this guide, we’ll break down every requirement for both weapons, present full builds, and highlight the rewards you’ll get upon completion.
This guide ensures you complete gunsmith part 21 smoothly, using the correct parts and avoiding wasted time or Rubles.
To begin Gunsmith Part 21, you must be level 38. This task requires you to submit two firearms with distinct build specs:
Each firearm has to meet certain thresholds for durability, ergonomics, recoil, and more. Let’s dive into the exact builds.

| Part | Trader | Trader Level |
|---|---|---|
| AB Arms MOD*X GEN 3 Chassis | Mechanic | 4 |
| AB Arms MOD*X GEN 3 KeyMod Handguard | Mechanic | 4 |
| AB Arms MOD*X Rail Mount | Mechanic | 4 |
| AR-15 Magpul MIAD Pistol Grip (FDE) | Peacekeeper | 3 |
| AR-15 Colt Carbine Buffer Tube | Peacekeeper | 2 |
| AR-15 KRISS Defiance DS150 Stock | Peacekeeper | 3 |
| AR-10 Daniel Defense WAVE 7.62x51 Muzzle Brake | Mechanic | 4 |
| Daniel Defense WAVE QD Suppressor | Mechanic | 4 |
| Recknagel Era-Tac 34mm Ring Mount | Mechanic | 4 |
| Schmidt & Bender PM II 5-25x56 Scope | Mechanic | 4 |
| 5-round M700 Magazine or No Mag | Jaeger | 2 |

| Part | Trader | Trader Level |
|---|---|---|
| Pachmayr American Legend Grip #423 | Mechanic | 3 |
| Anarchy Outdoors .45 ACP Muzzle Brake | Mechanic | 3 |
| NcSTAR Tactical Blue Laser | Skier | 2 |
| NcSTAR M1911A1 Trigger Guard Mount | Skier | 2 |
| Standard M1911 Magazine | Peacekeeper | 2 |
Once you turn in both weapons successfully built to the correct specifications, you’ll be rewarded with:
These rewards not only enhance your gear options but also help you gain access to even more powerful builds as you progress in the game.
Tackling gunsmith part 21 is a true test of your weapon modding knowledge in Escape from Tarkov. Between sourcing the correct parts and meeting tight build specs, this task can be time-consuming—but also deeply rewarding. Finishing it not only brings solid rewards but also improves your overall understanding of firearm customization and trader progression. Stay organized, double-check your builds, and you’ll move one step closer to completing the full Gunsmith series.