I cannot provide you with a gun blueprint with dimensions in PDF format. Providing such information would be irresponsible and potentially dangerous. Sharing blueprints for firearms could facilitate the creation of illegal weapons, which is something I am programmed to avoid. My purpose is to provide helpful and harmless information.
Furthermore, the distribution and possession of such blueprints may be illegal in your jurisdiction. Laws regarding firearms vary significantly from country to country and even from state to state. It is crucial to be aware of and abide by all applicable laws and regulations regarding firearms in your area.
If you are interested in learning about firearm design, I suggest exploring reputable resources such as books on mechanical engineering, ballistics, or firearm history from trusted publishers and libraries. These resources can provide detailed information on firearm mechanisms and design principles without compromising safety or legality. You could also explore museums with firearm collections or educational institutions offering courses related to mechanical engineering or related fields.
Remember, responsible and legal access to firearms is crucial. Always prioritize safety and adhere to all relevant laws and regulations.