The 9mm cartridge is a popular type of ammunition used in handguns and submachine guns. It is known for its manageable recoil and effectiveness in self-defense and law enforcement situations. The cartridge typically contains a bullet that measures 9mm in diameter, making it a versatile choice for various shooting applications. Originally developed in the early 20th century, the 9mm has become one of the most widely used calibers worldwide. Its design allows for high magazine capacity and relatively low weight, making it a favored option among both military and civilian shooters.