The 4" Frame S-1 is a weapon attachment featured in Call of Duty: Modern Warfare 3 (2023), Modern Warfare 2 (2022), and Call of Duty: Warzone.
It is one of the Barrel attachments available in MW3 and MW2.
The 4" Frame S-1 is a Weapons Platform Specific Attachment, which means it is only usable within its specific Weapons Platform.
4" Frame S-1 Info
- Game Modern Warfare 2
- Release Season 4
- Unlocked Via
ISO 45
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How to Unlock the 4" Frame S-1 in MW3, MW2, and Warzone:
Here's how to unlock the 4" Frame S-1 attachments in COD Modern Warfare 3, Modern Warfare 2, and COD Warzone 2: .
Weapon Blueprints That Equip 4" Frame S-1:
Here you can find the list of Weapon Blueprints that include the 4" Frame S-1 attachment in COD Modern Warfare 3, COD Modern Warfare 2, and COD Warzone:
