A semiautomatic handgun has a frame, a barrel mounted on the frame and having a chamber for receiving a cartridge, a slide mounted on the frame and over the barrel and longitudinally movable relative to the frame and the barrel, a firing mechanism for striking the cartridge, and a trigger for releasing the firing mechanism. The barrel has a peripheral wall portion extending from the chamber, a cylindrical portion forming a front terminal end of the barrel, and a conical portion disposed between and contiguous with each of the peripheral wall portion and the cylindrical portion.