@noyoushutthefuckupdad @coolboymew I've never understood people like that. Even if you actually intricately understand exactly how it functions and how to recreate it, you only know how to recreate it with modern tools, technology, and resources. They literally do not have the tools required to create the materials required to create the tools you require to make it, they are so far removed from modern technology that you basically need to design every single aspect of the process from scratch. Even if you know exactly how to create something modern, it's not going to help much when they don't even have the technology required to reliably create steel. Go back far enough, and they might not even be able to use iron. I doubt even the greatest firearms engineers on the planet could build a semi automatic pistol or rifle from scratch if they had to figure out how to mine, smelt, and forge every single piece from scratch, using no modern tools or materials whatsoever, unless they also happened to have an autistic savant level fascination with the complete history of metalworking throughout the ages; but some random fag thinks he can just go back in time and tell bronze age peasants "uhh in my time we have these things called guns" and have them recreate them.

That's assuming they even believe the random foreign intruder speaking in a strange tongue, babbling about heretical magics while insisting he is the greatest mind the kingdom has ever seen.