Pistol: A pistol is defined as a handgun in which the chamber is integral with the barrel. In plain English, this means that a pistol has one tube that holds the unfired cartridge in place until it's fired. This tube has two primary areas, the back, known as the chamber, and the front, which is the barrel. The chamber is machined to the exact shape of the specific type of cartridge the pistol is intended to fire, so that cartridge fits perfectly in place. When the handgun fires, the bullet separates from the cartridge case, exits the chamber, and travels down the barrel. The empty case automatically ejects from the chamber, and a new cartridge automatically takes its place.