And the weird part is, IT FIRES! Just like any real, killing guns! According to the owner, the miniature guns in the video below are originally made by Austrian watchmakers as decorative pocket watch chain fobs or as cufflinks. All of the guns featured fire 2mm blank pinfire cartridges, and are the world’s smallest working double action blank firing pistols. The guns just measure 38mm in length and are smaller than the famous Swiss Mini Gun which measures 55mm.