QardhanUnik

Swiss Mini Gun is a miniature double action revolver that has all the same features as a regular sized gun.
The total length of the firearm does not exceed 5.5 cm. It shoots 2.34 mm caliber bullets, the smallest rim fire ammunition in the world.

sumber :http://picgetmob.blogspot.com/2011/02/worlds-smallest-gun-from-swiss.html