The PF-9 is a semi-automatic, locked breech pistol, chambered for the 9mm Luger cartridge. The PF-9 has a single stack magazine holding 7-rounds. It is one of the lightest and flattest 9mm ever made. Firing mechanism is Double-Action Only with an automatic hammer block safety. The rear sight is adjustable for windage with the supplied allen wrench as well as for elevation with the use of shims (not included). The included 7 round rectangular magazine is supplied with a finger extension base plate and numbered holes. The under barrel accessory rail shares the dimensions of the MIL-STD-1913 picatinny rail although there is only one locking notch in the forward position.