Series 4-MR

The Series 4-MR 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 Series 4-MR is a Weapons Platform Specific Attachment, which means it is only usable within its specific Weapons Platform.

Series 4-MR Info

How to Unlock the Series 4-MR in MW3, MW2, and Warzone:

Here's how to unlock the Series 4-MR attachments in COD Modern Warfare 3, Modern Warfare 2, and COD Warzone 2: .

Weapon Blueprints That Equip Series 4-MR:

Here you can find the list of Weapon Blueprints that include the Series 4-MR attachment in COD Modern Warfare 3, COD Modern Warfare 2, and COD Warzone:

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  Crater Maker

  

  Loose Ends