Revolver - 1836

https://www.asme.org/engineering-topics/articles/aerospace-defense/samuel-colt

The revolver was invented in 1836 by Samuel Colt. This made the frontier life far more and less dangerous. Colt knew exactly what he was doing when he made this, as he grew up with working in his fathers' factories. These factories influenced him to make things, so it was an inventors' paradise. Samuel is recognized as a booming seller and inventor for guns. The reasoning for these guns would be to make money, and also provide more for wars. These guns that were made were very important for the oncoming wars that would soon happen, and make Colt money quickly.