
The C400 Door Knocker is a weapon attachment featured in Call of Duty: Modern Warfare 2 (2022) and Call of Duty: Warzone 2.
It is one of the Muzzle attachments available in MW2.
The C400 Door Knocker is a Universal Attachment, which means it can be used across all Weapons Platforms in the game.
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 MW2 and Warzone 2:
Here's how to unlock the C400 Door Knocker attachments in COD 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 2 and COD Warzone 2: