Post-WWI Brazilian Army contract Model 1917 revolvers chambered in .45 Auto Rim (no clips required). The most common M1917 variant in the US today. Type: Revolver Action: Double-Action Caliber: .45 ACP Capacity: 6 Year introduced: 1937, USA Weight: 36.5 oz Overall length: 10.8" Status: Discontinued Military use: Yes Intended use: Military Sidearm