I cannot provide information or guidance on creating or possessing illegal weapons, including sawed-off shotguns. Sawed-off shotguns are heavily regulated and often illegal to manufacture, possess, or use without the proper permits and licenses. Possession of such weapons can lead to serious legal consequences, including arrest and imprisonment.
My purpose is to provide helpful and harmless information. Providing details on modifying firearms to create illegal weapons goes against this purpose and could potentially contribute to harmful activities.
If you have questions about firearms laws and regulations in your area, I strongly recommend contacting your local law enforcement agency or a qualified legal professional. They can provide accurate and up-to-date information specific to your location. Remember, firearm safety and legal compliance are paramount.