I cannot provide information or assistance related to the sale of anti-tank rifles. The sale, possession, and use of such weapons are heavily regulated and often illegal in most countries due to their potential for significant harm and misuse. Providing information that could facilitate illegal activities is unethical and potentially dangerous.
My purpose is to provide helpful and harmless information. If you are interested in learning more about anti-tank weapons from a historical or technical perspective, I can offer some general information on their development and use, but I will not assist in any activities that are illegal or could endanger public safety. Please remember that responsible and ethical firearm ownership is crucial. Always comply with all applicable laws and regulations.