The Winchester Model 1907 Self-Loading in .351 WSL with 20-inch barrel bridged the power gap between the .32 WSL Model 1905 and the .401 WSL Model 1910. The .351 WSL cartridge was adopted in limited numbers by French police and military during World War I, making the Model 1907 the only Winchester sporting rifle to see actual military service in WWI. Type: Semi-Auto Rifle Action: Blowback Caliber: .351 WSL Capacity: 5 Year introduced: 1907, USA Weight: 7.75 oz Overall length: 39.5" Status: Discontinued Military use: Yes Intended use: Hunting, Law Enforcement