The Pistolet-Pulemyot Sudaeva (Пистолет-пулемёт Судаева, Sudayev submachine gun in English), also known as the PPS, is a Soviet submachine gun.
The PPS was created in response to requirements for a compact and lightweight weapon with similar accuracy and projectile energy to the earlier PPSh-41, with a reduced rate of fire, cheaper and requiring less manpower, particularly skilled manpower. Emphasis was placed on the design being cheap to produce, reducing the number of machined components to a bare minimum, and cutting down the time of machining by more than half. Prototypes of the PPS were tested in 1942, against an improved design by Georgy Shpagin, the PPSh-2, along with many other prototypes; the PPS was superior in most aspects when compared to its contenders. The weapon was put into small-scale production in 1942, with mass-production commencing in 1943. However, due to the massive amount of money already invested for PPSh-41 production, the Soviets decided that it was uneconomical to produce the PPS as the PPSh-41 was already being produced in very large numbers, and due to oversupply, production ceased in 1946. However, during the last two years of the war, Sudayev tinkered with the design of the PPS, in an attempt to improve it; these can be distinguished by different parts to the mass produced weapons.
The PPS is a conventional submachine gun that fires using blowback from an open bolt. It fires in full-automatic only. It is fitted with open iron sights.