However, no matter how much simpler the internal structure of a revolver was than a semi-auto onen automatic one, there were parts that could not be made in 1-2 days even though it had fewer components.
If I had to explain why, let me first explain the history of guns.
It means to create one gun, I had used the accumulated techniques of the world before I got reincarnated and reproduced these(techniques) with my own hands in this world.
First, the gunpowder—『the Black Powder』.