Ever wanted to see how a Kel-Tec PF9 pistol operates? Here’s an animated image of exactly what happens.First, the trigger is pulled, the internal hammer rotates forward and engages the firing pin. The pin impacts the primer on the 9mm cartridge and detonates the primer, which in turn ignites the powder. As the bullet leaves the barrel, the pressure also forces the slide to the rear. Attached to the slide is the casing extractor which hooks, pulls and ejects the spent casing. As the slide returns forward, the next round is loaded.