I know nothing about guns, except you pull on the trigger (slowly) and it goes bang. So I come here to ask the biggest collection of [whatever name y'all want to call yourselves] I know of. I suspect there are places on the internet with more knowledge, but I don't know of them............ So, if your knowledge base is hammering on Toledo steel, and it's about 1650AD, and you have to make a rifle (not a flintlock rifle) that shoots a modern-ish bullet, what do you have to do? Let's assume you have the raw metals around, but no industrial base. There is a 1650 era gunsmith around, who's 'very inventive'. Don't tell me to go to the nearest Army-Navy Surplus store and shop, and don't tell me to get real. This is a throw-back story that's *fiction* or *fantasy*.