The PPSh-41 (Pistolet-Pulemyot Shpagina; Russian: Пистолет-пулемёт Шпагина; "Shpagin machine pistol") submachine gun was one of the most mass produced weapons of its type in World War II. It was designed by Georgi Shpagin as an inexpensive alternative to the PPD-40. The PPSh operated with a simple blowback action, had a box or drum magazine, and fired the 7.62x25mm pistol round. It was made with metal stampings to ease production, and its chrome-lined chamber and bore helped to make the weapon very low-maintenance in combat environments.