


People weren't using muzzle-loaders for five centuries because they were too stupid to realize that they could reload faster if they had a cartridge instead of loose gunpowder, they just didn't have any reliable means to ignite the powder. I guess the biggest problem would be the production of reliable ammunition. you arrived to the late middle ages when the first very crude firearms started to make their appearance.

brought back an actual gun they can study and disassemble.I guess their job would be made a little easier if you There are some guns which were designed for simplicity and easy of production, like the British Sten, so let's assume you have chosen a very simplistic gun. Could a group of experienced smiths and jewelers reproduce it? What would the major issues be? Assume you traveled back in time to the middle ages, and you brought with you the schematics of a fully automatic firearm.
