#3 Sam Colt Was in His Late Teens When He Invented the Revolver

Even if you know nothing about guns or fire arms, you might have heard the term “Colt,” at least in movies or action games, where somebody describes about his gun. The whole credit goes to Sam Colt, who spent his teens fiddling with gun designs.

At the age of 15, Colt began working in his father’s textile plant. He was interested in reading about gun powders and engines than comics. Once, after hearing soldiers talk about the success of the double-barreled rifle and the impossibility of a gun that could shoot five or six times without reloading, Colt decided that he would create the "impossible gun".

But his first venture at gun making was a failure, till he met Sam Walker, who was a military officer. Walker suggested some improvements to the gun and himself ordered thousand of them for use in the Mexican-American War. The rest is history as the company had since then sold more than 30 million firearms worldwide and is still supplying.