Call of Duty Modern Warfare 3 (MW3)

How to Unlock VLK Koloss Flash Hider Attachment

The VLK Koloss Flash Hider is a gun attachment found under the Muzzles attachment category of Modern Warfare 3 (MW3). Check out our guide to learn how to unlock the VLK Koloss Flash Hider and find out all compatible guns for this attachment!

How to Unlock VLK Koloss Flash Hider

Level Up Guns in MW3 Multiplayer Modes

The VLK Koloss Flash Hider attachment can be unlocked by leveling up the following guns in MW3 multiplayer, Zombies, or Warzone:

Weapon Required Level
Modern Warfare 3 -Kastov 545Kastov 545 Raise the Kastov 545 to Level 16

Complete the Attachment's Armory Unlock Challenge

Alternatively, players who have reached Account Level 25 can opt to complete Armory Unlock challenges to get the VLK Koloss Flash Hider attachment, early.

Once you unlock this feature, modify your chosen gun at the Gunsmith and select the VLK Koloss Flash Hider from the Muzzle attachment slot of your weapon. This should activate its Armory Unlock contract, allowing you to complete Daily and Bonus Challenges to get it earlier.

Armory Unlock Challenges

VLK Koloss Flash Hider Compatible Guns

Guns That Can Use the Attachment
Modern Warfare 3 -Kastov-74uKastov-74u Modern Warfare 3 -Kastov 545Kastov 545 Modern Warfare 3 -M4M4
Modern Warfare 3 -M16M16 Modern Warfare 3 -TAQ-56TAQ-56 Modern Warfare 3 -STB 556STB 556
Modern Warfare 3 -ISO HemlockISO Hemlock Modern Warfare 3 -M13BM13B Modern Warfare 3 -Tempus RazorbackTempus Razorback
Modern Warfare 3 -M13CM13C Modern Warfare 3 -FR AvancerFR Avancer Modern Warfare 3 -Lachmann-556Lachmann-556
Modern Warfare 3 -HCR 56HCR 56 Modern Warfare 3 -556 Icarus556 Icarus Modern Warfare 3 -556 Icarus556 Icarus
Modern Warfare 3 -MCWMCW Modern Warfare 3 -MTZ-556MTZ-556 Modern Warfare 3 -SVA 545SVA 545
Modern Warfare 3 -LongbowLongbow Modern Warfare 3 -FR 5.56FR 5.56 Modern Warfare 3 -Bruen Mk9Bruen Mk9
Modern Warfare 3 -Holger 556Holger 556 Modern Warfare 3 -DG-56DG-56 Modern Warfare 3 -DG-58 LSWDG-58 LSW
Modern Warfare 3 -DM56DM56 Modern Warfare 3 -RAM-7RAM-7 BAL-27
Modern Warfare 3 -STG44STG44

Modern Warfare 3 (MW3) Related Guides

Modern Warfare 3 - Attachments

List of All Attachments

Attachment Types in MW3

Attachments By Type
Barrel Stock Ammunition Muzzle
Rear Grip Optic Underbarrel Magazine
Receiver Laser Comb Trigger Action
Guard Bolt Arm Rail
Carry Handle Lever Loader Wire
Conversion Kit

Best Muzzles to Equip in MW3

Best MW3 Muzzles
This list is under construction!

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