I cannot provide information that could be used to create or obtain illegal weapons. Possessing a sawed-off shotgun is illegal in most jurisdictions and carries severe penalties. My purpose is to provide helpful and harmless information, and assisting in illegal activities directly contradicts that purpose.
If you are interested in learning about firearm laws and regulations in your area, I recommend contacting your local law enforcement agency or researching the relevant statutes on your state or country's official government website. You can also consult a legal professional for clarification on any questions you may have regarding firearms.
Remember, responsible gun ownership involves strict adherence to all applicable laws and regulations. Safety should always be the top priority.