The 9x19mm Parabellum, also known as 9mm Luger, is a popular handgun cartridge developed in 1902 by Georg Luger. It is widely used in military, law enforcement, and civilian firearms due to its effective balance of power, recoil, and accuracy. This cartridge has a bullet diameter of 9mm and a case length of 19mm, making it suitable for a variety of handguns and submachine guns. Its versatility and availability have contributed to its status as one of the most commonly used ammunition types worldwide.