Armi San Marcos Colt 1860 Cartridge Conversion Revolver An overview and range review of theĀ Armi San Marcos Colt 1860 Cartridge Conversion Revolver. Share this gun video:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Tumblr (Opens in new window)