C400 Door Knocker - Modern Warfare 3 - Modern Warfare 3

C400 Door Knocker Attachment

The C400 Door Knocker is a weapon attachment featured in Call of Duty: Modern Warfare 3 (2022) and Call of Duty: Warzone 2.

It is one of the Muzzle attachments available in MW3.

The C400 Door Knocker is a Universal Attachment, which means it can be used across all Weapons Platforms 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

    Attachment Type: Muzzle
    Release: Game Launch
    How To Unlock: Get the M16 to Level 5
    Unlocked Via: M16

    How to Unlock the C400 Door Knocker in MW3 and Warzone 2:

    Here's how to unlock the C400 Door Knocker attachments in COD Modern Warfare 3 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 and COD Warzone 2:

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    Modern Warfare 3 Attachments