Single action, tilting barrel, positive-lock mechanism pistol with a patented recoil attenuating system developed specifically to handle the potent and highly terminal 7.5 FK cartridge. The PSD Pistol comes standard with an extra dual-calibre barrel in 10 mm/.40 S&W or in 9mm and uses standard 7.5 FK multi-calibre magazine. This model includes the 9mm conversion barrel. 10mm/40S&W can be purchased separately from the manufacturer FEATURES Quick and easy barrel/calibre conversion. Proprietary recoil attenuating system. Proprietary multi-calibre magazine allows the use of 3 calibres, 7.5 FK, 10mm, and .40 S&W. Textured, ergonomic frame provides a secure and comfortable grip. Integrated optics mounting platform compatible with most leading brands. Rapid acquisition sight system that does not require adjustment within the range spectrum. Sights shoot to aiming point up to 100 meters with the 7.5 FK calibre. Picatinny rail for easy mounting of accessories. Lifetime warranty on frame and slide.