Greetings everybody; I have just acquired a small pistol that I cannot seem to find any information on. It is a single shot type, can't figure the caliber and it's smaller than .32S&W. It has a tiny release button underneath that allows the barrel to swing out for loading and unloading. Here's a phot and if anyone can shed some light on this I'd be grateful. It has the letters GEM engraved on the top strap and has a serial number of 1436. Any ideas? Im pretty sure this cartridge isn't right either. Thanks everyone. Bud. ps That's a .50 Cal round bye the way.