This is the firing cycle of the Kel-Tec PF-9 semi-automatic pistol. Kel-Tec describes the PF-9, "The PF-9 is a semi-automatic, locked breech pistol, chambered for the 9 mm Luger cartridge. It has been developed from our highly successful P-11 and P-3AT pistols with maximum concealability in mind. The PF-9 has a single stack magazine holding 7 rounds. It is the lightest and flattest 9 mm ever made. Firing mechanism is Double-Action Only with an automatic hammer block safety. The PF-9 will be available in blued, parkerized, and hard chrome finishes. Grips will be in black, grey, and olive drab."