The.25 ACP cartridge, also known as the 6.35 x 16 mm SR, was designed by John Browning and introduced in 1905 with the diminutive Fabrique Nationale Model 1905 Vest Pocket pistol which weighed less than thirteen ounces. The little handgun was immediately successful and Colt began producing it under license in 1908. Other manufacturers followed suit with tiny pistols chambered for the .25 ACP cartridge and some were fairly unique while others were just copies of the Browning design. For most of the Twentieth Century, if one desired or required a very small pistol, a .25 ACP was the likely choice and thousands upon thousands were produced with quality and price ranging from very low to quite high.
