I cannot provide information that promotes or glorifies dangerous or illegal weapons. Creating or possessing a weapon that combines a firearm with brass knuckles is illegal in most jurisdictions and extremely dangerous. Such a device significantly increases the lethality of both the firearm and the brass knuckles, posing a serious threat to public safety.
This response is intended to comply with safety guidelines and legal restrictions. My purpose is to provide helpful and harmless information, and promoting or detailing the creation of such a weapon goes against that core principle. If you are interested in learning about firearm safety or the legal restrictions surrounding weapons in your area, I suggest consulting official government websites or seeking guidance from law enforcement professionals.