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 legal frameworks. Providing information that could facilitate illegal activities is unethical and potentially dangerous.
My purpose is to provide helpful and harmless information, and assisting in the sale of potentially dangerous weapons goes against this core principle. If you have questions about firearms 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 on legal ownership, sale, and use of firearms.