Colt New Service chambered in .45 ACP using half-moon clips, issued as Model 1917 during WWI when M1911 supply was short. Type: Revolver Action: Double-Action Revolver Caliber: .45 ACP Capacity: 6 Year introduced: 1917, USA Weight: 40.5 oz Overall length: 10.75" Status: Discontinued Military use: Yes Intended use: Military