The 711mm Matuzek D50 is a weapon attachment featured in Call of Duty: Modern Warfare 3 (2022) and Call of Duty: Warzone 2.
It is one of the Barrel attachments available in MW3.
The 711mm Matuzek D50 is a Weapons Platform Specific Attachment, which means it is only usable within its specific Weapons Platform.
Here's how to unlock the 711mm Matuzek D50 attachments in COD Modern Warfare 3 and COD Warzone 2: Get the Lockwood 300 to Level 5.
Here you can find the list of Weapon Blueprints that include the 711mm Matuzek D50 attachment in COD Modern Warfare 3 and COD Warzone 2: