Barrels are a type of weapon attachment in Call of Duty: Modern Warfare 3 (MW3 2022). Read on for a complete list of gun barrels including how to unlock each of them.
| Attachment | How to Unlock |
|---|---|
| 15.5” Theta-X13 | ・Get the TAQ-M to Level 8. |
| LR:7 20.5” Barrel | ・Get the TAQ-M to Level 16. |
| 12” Tacshort Barrel | ・Get the TAQ-56 to Level 3. |
| 11.5” T-H4 Barrel | ・Get the M4 to Level 4. |
| Tempus Trench Pro | ・Get the M4 to Level 10. |
| FTac SB | ・Get the 556 Icarus to Level 12. |
| 419MM EXF Barrel | ・Get the FTAC Recon to Level 6. |
| 14.5” Tundra Pro Barrel | ・Get the TAQ-56 to Level 12. |
| Lance-50 12” Barrel | ・Get the TAQ-V to Level 11. |
| 18” Precision-6 Barrel | ・Get the TAQ-V to Level 18. |
| Hightower 20” Barrel | ・Get the M4 to Level 15. |
| FTac Coldforge 16” Barrel | ・Get the 556 Icarus to Level 4. |
| 14” Carbine Shroud | ・Get the M16 to Level 3. |
| 11.5” Carbine Shroud | ・Get the M16 to Level 9. |
| 7.5” Tempus Firebrand | ・Get the FTAC Recon to Level 18. |
| Bull Rider 16.5” | ・Get the FTAC Recon to Level 22. |
| FSS Cannonade 16” | ・Get the FSS Hurricane to Level 7. |
| FSS-X7 Barrel | ・Get the FSS Hurricane to Level 10. |
| TAC 597 Barrel | ・Get the RPK to Level 3. |
| KAS-10 584mm Barrel | ・Get the RPK to Level 16. |
| KAS-7 406mm | ・Get the Kastov 762 to Level 17. |
| IG-K30 406mm | ・Get the Kastov 545 to Level 5. |
| 342mm SAKIN KL | ・Get the Kastov 545 to Level 14. |
| SA Ultra III | ・Get the Kastov-74u to Level 4. |
| BR209 Barrel | ・Get the Kastov-74u to Level 11. |
| ShortTAC 330mm | ・Get the Kastov-74u to Level 16. |
| SA Response III | ・Get the Vaznev-9K to Level 7. |
| KAS-1 381mm | ・Get the Vaznev-9K to Level 14. |
| BAK-9 279mm Barrel | ・Get the Minibak to Level 5. |
| 15.9” Lachmann RAPP Barrel | ・Get the Lachmann-762 to Level 3. |
| Meer-56 11” Factory | ・Get the Lachmann-762 to Level 7. |
| LM Aurora 90 Barrel | ・Get the Lachmann-556 to Level 5. |
| Lach-12 Barrel | ・Get the Lachmann-556 to Level 17. |
| 22.5” Elevate-11 | ・Get the SP-R 208 to Level 4. |
| 16” ZLR Executor 80 Barrel | |
| 12.5” Carbon Barrel | |
| 9” TAC-CB 55 | |
| 18.5” XRK Resonate | |
| 23.5” Fluted R-67 | |
| 22” Cavalry Barrel | |
| FTac M-Sub 12” | |
| L38 Falcon 226mm | |
| Lachmann Pulsar | |
| 10.6” Lachstrike Barrel | ・Get the RAPP H to Level 4. |
| Romeo FT 16” Barrel | ・Get the RAPP H to Level 16. |
| Lachmann Nova | ・Get the LM-S to Level 12. |
| 18” Demo Firewall | ・Get the Bryson 800 to Level 2. |
| Kastovia 343 | ・Get the Kastov 762 to Level 3. |
| 18” Bruen Guerilla | ・Get the STB 556 to Level 3. |
| 24.4” Bruen S-620 | ・Get the STB 556 to Level 14. |
| 508MM Rear Guard | ・Get the STB 556 to Level 11. |
| Bruen Turaco 686mm | |
| FTac FB20 | |
| Demo 501 Factory | |
| Kastovia 406 | |
| 16.5” Bruen S901 | |
| Lachmann Dart 165mm | ・Get the VEL 46 to Level 4. |
| Schlager RV-B | ・Get the VEL 46 to Level 27. |
| Tango 228 Barrel | ・Get the VEL 46 to Level 22. |
| Schlager L203 Barrel | ・Get the VEL 46 to Level 20. |
| Lach-DX 203mm | ・Get the VEL 46 to Level 15. |
| Lach-165 Zulu | ・Get the VEL 46 to Level 9. |
| LM Series-7 | ・Get the VEL 46 to Level 11. |
| 9.5″ Duke-30 | ・Get the PDSW 528 to Level 2. |
| Bryson Snubby | ・Get the Basilisk to Level 7. |
| FTAC Series IX 14.5” | ・Get the PDSW 528 to Level 9. |
| 16.5” STB Factory | |
| FTac Defense 14.5” | |
| 17” Corvus Prorange | |
| 16” Cloak 90 | |
| 18.75” Cloak 90 | |
| FTac 8.5” Recon | |
| Forge Tac Ninja | |
| Fennec Covert Force | |
| ZLR 16.5” Ignition Barrel | |
| 5.5” Fennec Minitac |