The Villar-Perosa M1915 Twin SMG is a italy-made full-auto submachine gun chambered in 9mm Glisenti, introduced in 1915. Primary use: military. Type: Submachine Gun Action: Full-Auto Caliber: 9mm Glisenti Capacity: 30 Year introduced: 1915, Italy Weight: 88 oz Overall length: 24" Status: Discontinued Military use: Yes Intended use: military