Call of Duty Modern Warfare 3 (MW3) Walkthrough & Guides Wiki

Call of Duty Modern Warfare 3 (MW3)

How to Unlock .500 Hardened Rounds Attachment

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The .500 Hardened Rounds is a gun attachment found under the Ammunitions attachment category of Modern Warfare 3 (MW3). Check out our guide to learn how to unlock the .500 Hardened Rounds and find out all compatible guns for this attachment!

List of Contents

How to Unlock .500 Hardened Rounds

Level Up Guns in MW3 Multiplayer Modes

The .500 Hardened Rounds attachment can be unlocked by leveling up the following guns in MW3 multiplayer, Zombies, or Warzone:

Modern Warfare 3 - Rocket icon Attention! This section is under construction! Check back soon as we update this page with MW3 unlock info for this attachment.

Complete the Attachment's Armory Unlock Challenge

Modern Warfare 3 - Armory Unlock Challenge for Attachments

Alternatively, players who have reached Account Level 25 can opt to complete Armory Unlock challenges to get the .500 Hardened Rounds attachment, early.

Once you unlock this feature, modify your chosen gun at the Gunsmith and select the .500 Hardened Rounds from the Ammunition 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

.500 Hardened Rounds Compatible Guns

Modern Warfare 3 - Rocket icon Attention! This section is under construction! Check back soon as we update this page MW3 guns that can use this attachment.

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 Ammunition to Equip in MW3

Best MW3 Ammunition
This list is under construction!

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