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The ST Pyro Heavy Barrel is a gun attachment found under the Barrels attachment category of Modern Warfare 3 (MW3). Check out our guide to learn how to unlock the ST Pyro Heavy Barrel and find out all compatible guns for this attachment!
List of Contents
The ST Pyro Heavy Barrel attachment can be unlocked by leveling up the following guns in MW3 multiplayer, Zombies, or Warzone:
| Weapon | Required Level |
|---|---|
 Pulemyot 762
|
Raise the Pulemyot 762 to Level 7 |
Alternatively, players who have reached Account Level 25 can opt to complete Armory Unlock challenges to get the ST Pyro Heavy Barrel attachment, early.
Once you unlock this feature, modify your chosen gun at the Gunsmith and select the ST Pyro Heavy Barrel from the Barrel attachment slot of your weapon. This should activate its Armory Unlock contract, allowing you to complete Daily and Bonus Challenges to get it earlier.
| Guns That Can Use the Attachment | ||
|---|---|---|
|
Pulemyot 762
|
||
| 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 MW3 Barrels |
|---|
| This list is under construction! |
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