WWI emergency revolver using half-moon clips to chamber .45 ACP in a large-frame swing-out cylinder revolver; co-produced with Smith & Wesson to meet wartime demand. Type: Revolver Action: Double-Action Caliber: .45 ACP Capacity: 6 Year introduced: 1917, USA Weight: 40 oz Overall length: 10.75" Status: Discontinued Military use: Yes Intended use: Military, Collecting