World renowned for his many outstanding small arms designs, John M. Browning achieved immortality in his timeless .45 ACP caliber Model of 1911 pistol. Now close to being a century old, the pistol that is Browning’s finest hour is more popular than ever before. However, as great as Browning’s first 1911 was, it is the many refinements since made to the pistol that have kept it so popular.