The world's smallest revolver

Precision, reliability and mechanical mastery are some of the common traits shared by gun manufacturers and watchmakers. The SwissMiniGun is what you get when both worlds collide.  At a mere 5.5 cm, it is recognised by Guinness World Records as the world's smallest revolver. Weighing just under 20 grams it can fire specially made 2.34 mm rim-fire ammunition.  It is not capable of serious harm with a maximum power of less than one joule: around ten times less than some air or BB guns on the market.