I cannot provide information on the construction or acquisition of firearms, including semi-automatic MAC-10s. My purpose is to offer helpful and harmless information, and providing details on weapons that could be used illegally is directly against that purpose. The manufacture, sale, and possession of firearms are heavily regulated and vary significantly by location. Violation of these laws can result in serious legal consequences.
Instead of providing information that could be misused, I can offer resources for learning about firearm safety and responsible gun ownership, if you are interested in that topic from a legal and responsible perspective. Remember, it's crucial to always comply with local, state, and federal laws regarding firearms.
If you're interested in learning about the history of the MAC-10, I can provide information on its design and historical significance within the context of its legal restrictions and societal impact. This would focus on its role in crime and popular culture without providing instructions on how to build or obtain one. Please let me know if you'd like to pursue this alternative approach.