So in my DND campaign setting, I had planned on black powder being a pretty recent discovery, called flashsand by the country who discovered it. One of my players wanted to be a gunslinger, so we worked out that he would have the first gun, built by his father who had to hide from the military to keep it out of the wrong hands. He wanted a revolver and to be a proto-desperado type, and I frankly didn’t want to litigate logistics with a first-time player. I had been having a tough time squaring the circle between “first gun” and “revolver” but this is a perfect middleground!