The C400 Door Knocker 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 Muzzle attachments available in MW3 and MW2.

The C400 Door Knocker is a Universal Attachment, which means it can be used across all Weapons in the game.

  • Pros Melee Damage
  • Cons Aim Down Sight Speed
C400 Door Knocker
This breacher muzzle brake gives the edge in close-quarters combat with increased melee damage.

C400 Door Knocker Info

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  • How to Unlock the C400 Door Knocker in MW3, MW2, and Warzone:

    Here's how to unlock the C400 Door Knocker attachments in COD Modern Warfare 3, Modern Warfare 2, and COD Warzone 2: Get the M16 to Level 5.

    Weapon Blueprints That Equip C400 Door Knocker:

    Here you can find the list of Weapon Blueprints that include the C400 Door Knocker attachment in COD Modern Warfare 3, COD Modern Warfare 2, and COD Warzone:

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