Underbarrels are a type of weapon attachment in Call of Duty: Modern Warfare 3 (MW3 2022). Read on for a complete list of underbarrel attachments including how to unlock each of them.
| Attachment | How to Unlock |
|---|---|
| FSS Sharkfin 90 | ・Get the M4 to Level 6. ・Get the Fennec 45 to Level 2. |
| VX Pineapple | ・Get the 556 Icarus to Level 14. |
| SPW 40mm | ・Get the M16 to Level 13. |
| Demo Imp-44 Grip | ・Get the TAQ-56 to Level 6. |
| Bruen Tilt Grip | ・Get the TAQ-56 to Level 13. |
| Hellscream 40mm | ・Get the TAQ-56 to Level 15. |
| Merc Foregrip | ・Get the TAQ-V to Level 6. |
| Bipod V9 Grip | ・Get the TAQ-V to Level 19. |
| RPK Bipod | ・Get the RPK to Level 14. |
| Schlager Tango | ・Get the Kastov 762 to Level 7. |
| KL40-M2 | ・Get the Kastov 762 to Level 15. |
| Corvus Masterkey | ・Get the Kastov 545 to Level 18. |
| Edge-47 Grip | ・Get the Kastov-74u to Level 9. |
| Phase-3 Grip | ・Get the Vaznev-9K to Level 9. |
| FTac Ripper 56 | ・Get the Lachmann-762 to Level 6. |
| Demo Firm Grip | ・Get the Lockwood Mk2 to Level 9. |
| XTEN Gravedigger | ・Get the Signal 50 to Level 9. |
| Level Aim Bipod | ・Get the SP-R 208 to Level 8. |
| Cornerstone Bipod | ・Get the MCPR-300 to Level 19. |
| XTen Stable Shot | |
| Demo Cleanshot 40 | ・Get the Lockwood 300 to Level 8. |
| Lockgrip Precision-40 | ・Get the Lachmann Sub to Level 9. |
| FTac Tiger Grip | |
| DI-Grip 4.5 | ・Get the RAPP H to Level 8. |
| Hound-9G Grip | ・Get the RAPP H to Level 13. |
| B052 Grip | ・Get the RAPP H to Level 18. |
| Cronen Grooveshot Grip | ・Get the Bryson 800 to Level 7. |
| Agent Grip | ・Get the X13 Auto to Level 17. |
| Bruen Sync Shot Grip | ・Get the PDSW 528 to Level 22. |
| XTEN Drop Grip | ・Get the STB 556 to Level 8. |
| Hex-40 Grip | |
| OP-X9 Foregrip | ・Get the EBR-14 to Level 6. |
| Operator Foregrip | ・Get the VEL 46 to Level 3. |
| TV Wrecker Grip | ・Get the HCR 56 to Level . |
| Bruen Warrior Grip | |
| TL40 Fire Drake | ・Get the STB 556 to Level 16. |
| RAAL Bipod | ・Get the RAAL MG to Level 3. |