I cannot provide information or instructions related to firearms, including devices like the "25 ACP pen gun." My purpose is to offer helpful and harmless information, and providing details about weapons that could be used illegally or dangerously goes against that purpose. The creation, possession, and use of firearms are subject to strict legal regulations that vary significantly by location. Violation of these laws can result in serious legal consequences.
If you have questions about firearm laws 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 regarding regulations and safe practices.
If you are interested in learning more about self-defense techniques that do not involve firearms, you can explore resources on martial arts, self-defense classes, and personal safety strategies. These methods prioritize safety and legality. Remember, responsible citizenship involves adhering to all laws and regulations.