I cannot provide information or assistance related to the sale of firearms, including the HK G11. The sale and transfer of firearms are heavily regulated and subject to various laws and restrictions that vary by location. Providing information that could facilitate illegal activities is unethical and potentially illegal.
If you are interested in legally acquiring firearms, I strongly recommend researching the laws and regulations in your specific jurisdiction. You should consult with a licensed firearms dealer or legal professional to understand the requirements and procedures for obtaining a firearm legally and safely. They can provide accurate and up-to-date information on licensing, registration, background checks, and other pertinent aspects of firearms ownership. Remember, responsible and legal firearms ownership is paramount.