A semiautomatic handgun is a type of firearm that automatically reloads after each shot but requires the shooter to pull the trigger for each round fired. This means that after firing a bullet, the gun uses the energy from the shot to eject the spent cartridge and load a new one from the magazine, allowing for quicker follow-up shots compared to revolvers. These handguns typically have a magazine that holds multiple rounds, making them popular for self-defense and law enforcement. Semiautomatic handguns come in various calibers and designs, with notable examples including the Glock and 1911.