
Gunsmith Master – Part 9 is the thermal M4A1 build with an FDE NT4 suppressor and MK10 handguard. This is not the ordinary USEC Gunsmith – M4A1 task; its weight limit and required attachments are different.
Objectives
- Modify an M4A1 to comply with the given specifications
Weapon specifications
- 60 Durability
- 40 or more ergonomics
- 280 or less recoil
- 5 kg or less in weight
- A magazine with a capacity of at least 60
- KAC QDSS NT4 5.56×45 sound suppressor (FDE)
- AR-15 Alexander Arms MK10 rifle length handguard
- Trijicon REAP-IR thermal scope
How to complete the build
Fit the Trijicon REAP-IR, FDE KAC NT4 suppressor, rifle-length MK10 handguard and a magazine holding at least 60 rounds.
The thermal sight makes this an expensive build, so check your access to the required parts first. Weigh the assembled rifle rather than relying on the weight of the base M4A1.
Check the complete weapon in the inspection window before handing it over. The quest checkmark can be inconsistent even when a build qualifies, so a missing marker alone does not prove the weapon cannot be submitted.
Build screenshots
These screenshots show our earlier M4A1 setups. Use the current specifications above when checking your finished build.
Example parts and trader access
These parts form an example configuration. Follow any alternative-part choices in the table and check the assembled weapon against every required stat. LL refers to trader loyalty level.
| Component | Trader | Access |
|---|---|---|
| Magazine – You only need one of the below | ||
| AR-15 5.56×45 SureFire MAG5-60 STANAG 60-round magazine | Peacekeeper | LL3 (Barter) |
| OR | ||
| AR-15 5.56×45 Magpul PMAG D-60 STANAG 60-round magazine | Peacekeeper / Ref | LL4 (Barter) / LL4 |
| OR | ||
| AR-15 5.56×45 SureFire MAG5-100 STANAG 100-round magazine | Mechanic | LL4 |
| AR-15 Alexander Arms MK10 rifle length handguard | Mechanic | LL4 |
| Alexander Arms 10 inch rail | Mechanic | LL4 |
| Zenit RK-1 tactical foregrip | Skier | LL3 |
| AR-15 Magpul MIAD pistol grip (FDE) | Peacekeeper | LL2 |
| AR-15 5.56×45 10.3 inch barrel | / Peacekeeper / Mechanic | LL2 (Barter) / LL3 / LL2 (Barter) |
| AR-15 KAC QDC 5.56×45 Flash Suppressor Kit | Peacekeeper | LL2 |
| KAC QDSS NT4 5.56×45 sound suppressor (FDE) | Loot Only | |
| AR-15 Ballistic Advantage Lo-Pro Gas Block | Mechanic | LL3 |
| UNV DLOC-IRD sight mount | Jaeger | LL2 (Barter) |
| Trijicon REAP-IR thermal scope | Mechanic / Skier | LL4 (Barter) / LL4 (Barter) |
| Trijicon REAP-IR scope eyecup | Jaeger | LL3 (Barter) / LL3 |
| AR-15 KRISS Defiance DS150 stock | Peacekeeper | LL3 |
| AR-15 Magpul B.A.D. Lever bolt release | Mechanic | LL3 |
Rewards
- +28,000 EXP
- 275,000 Roubles 288,750 Roubles with Intelligence Center Level 1 316,250 Roubles with Intelligence Center Level 2
- 1× Magazine case
For more of Mechanic’s weapon builds, see our Gunsmith Master – Part 2 and Gunsmith Master – Part 7 guides.







