Those are 1847 Colt-Walker .44 six-shooters Josey Wales carries in his holsters. The belt gun is a .44 1860 Army. He had a .32 caliber Colt "Baby" hideout in a shoulder holster. The six-guns used in the Dollars movies were '51 Navies and '60 Armies converted from cap and ball to metallic cartridges. The Virtual Virtuoso Gunsmith, Questor has modeled most of them.