SwissMiniGun produced the smallest revolver in the world, as a collector’s item.It has all the same features found on a real-size revolver, except that it does not exceed 2.16-inches (5.5 cm).The fun-sized pistol can fire 2.34 calibre bullets (the smallest rim fire ammunition in the world) at a speed of 270mph, that’s powerful enough to kill at close range.