how to remove a pinned and welded muzzle device

Removing a pinned and welded muzzle device can be a bit more challenging than removing a standard muzzle device because it’s designed to be permanently attached to the barrel. This process should only be done if you are legally allowed to modify your firearm, and you are aware of any local laws and regulations regarding firearm modifications. Here’s a general guide to help you remove a pinned and welded muzzle device:

Tools you will need:

  1. Bench vise or barrel vise
  2. Barrel wrench or armorer’s wrench
  3. Heat source (propane torch or heat gun)
  4. Pipe or cheater bar (for additional leverage, if necessary)
  5. Barrel blocks or padded clamps (to protect the barrel finish)

Safety Precautions:

  • Ensure that the firearm is unloaded and the magazine is removed.
  • Use eye protection and gloves when working with heat.
  • Work in a well-ventilated area or outdoors when using a torch.


  1. Secure the Firearm: Place the firearm in a bench vise or use a barrel vise to secure the barrel firmly without damaging it. Ensure that the upper receiver or action is well supported to prevent any damage.
  2. Heat the Pinned Area: Apply heat to the area where the muzzle device is pinned and welded. Use a propane torch or heat gun. The goal is to heat the metal around the pinned area until it becomes red hot. Be careful not to overheat or damage the barrel.
  3. Loosen the Muzzle Device: While the barrel is still hot, use a barrel wrench or armorer’s wrench to attempt to loosen the muzzle device. Apply steady, even pressure in a counterclockwise (lefty-loosey) direction. The heat should help soften any adhesive or thread-locker used during the pinning process.
  4. Use a Cheater Bar (if necessary): If the muzzle device doesn’t loosen with reasonable effort, you may need to use a pipe or cheater bar to provide additional leverage. Be cautious not to over-torque and damage the barrel or the wrench.
  5. Continue to Heat and Loosen: If the muzzle device still won’t come off, reapply heat as needed and continue to try loosening it. The combination of heat and torque should eventually break the weld.
  6. Inspect and Clean: Once the muzzle device is removed, inspect the threads on the barrel and clean them of any residual thread-locker or debris. You may also want to clean the inside of the muzzle device if you plan to reuse it.
  7. Reassemble or Replace: If you plan to reattach the muzzle device, ensure it’s properly aligned and torqued to the manufacturer’s specifications. If you’re replacing it with a new muzzle device, follow the manufacturer’s installation instructions.

Always exercise caution and patience when working with firearms. If you’re unsure or uncomfortable with this process, it’s best to seek the assistance of a qualified gunsmith or firearm technician to ensure the safe removal and installation of muzzle devices on your firearm. Additionally, make sure you are compliant with all local, state, and federal laws regarding firearm modifications.

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