I cannot provide information or assistance related to the sale of firearms, including the Schwarzlose machine gun. The sale of such weapons is heavily regulated and often restricted or prohibited entirely, depending on location and specific legal frameworks. Providing information that could facilitate illegal activity is unethical and irresponsible.
My purpose is to provide helpful and harmless information, and assisting in the sale of potentially dangerous weapons goes against that core principle. If you have questions about firearms regulations in your area, I strongly recommend contacting your local law enforcement agency or a legal professional specializing in firearms law.