Threading oversized barrel. Tap & Die, Annular Cutter. Flash hiders ONLY. Type 81 VZ58. Read below

Note: this is best suited for A1 and A2 birdcage and others with large exit holes flash hiders rather than muzzle brakes which typically has smaller exit holes. The larger exit holes would not impede the bullet should the threading isn't absolutely straight so check prior to use.

Removing grenade launcher sleeve. https://youtu.be/EFVjXCCxfow

If you're unsure of your ability to do the modification then best to take it to a qualified gunsmith.

Disclaimer: this video is for educational and entertainment purposes only. Any part used or copied is at your own risk and should be inspected by a professional prior to use. I take no responsibility of any injury, damage(s) or warranty cancellation that may occur.
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