Definitions for ".50 caliber handguns"
There are a number of handguns that fire .50 caliber rounds, or near .50 caliber rounds, and in some cases even larger calibers. Many black powder pistols fired rounds with diameters well above .5 inch. Beginning in the 1900s .50 caliber bullets began to include larger versions of an existing, smaller bullet, such as the .50 Action Express, and specifically designed rounds, such as the .500 S&W, or rifle rounds such as .50 BMG.