The Villar-Perosa OVP M1918 SMG Conversion is a italy-made select-fire submachine gun chambered in 9mm Glisenti, introduced in 1918. Primary use: military. Type: Submachine Gun Action: Select-Fire Caliber: 9mm Glisenti Capacity: 30 Year introduced: 1918, Italy Weight: 88 oz Overall length: 24" Status: Discontinued Military use: Yes Intended use: military