The Colt Model 1905 was the pistol that introduced the .45 ACP cartridge, developed by John Browning specifically for this gun. Chambered in the newly created .45 Automatic Colt Pistol round, the Model 1905 was submitted to US Army trials and served as the direct predecessor to the M1911. Unlike the M1911 it lacked a grip safety and had a different hammer configuration. About 6,100 were made, making it a rare and historically significant milestone in American firearms history. Type: Pistol Action: Semi-Automatic Caliber: 45 ACP Capacity: 7 Year introduced: 1905, USA Weight: 36 oz Overall length: 8" Status: Discontinued Military use: Yes Intended use: military, collector, historical, Military Trials, Collecting