PSS
The 7.62 mm PSS (special-purpose, self-loading, Index 6P28, code name «Val» pistol) was developed at the TsNII (Cenlral Research Institute) TOCHMASH by V.N. Levchenko and Yu.M. Krilov chambered for the SP-4 car¬tridge developed by V. A. Petrov. This complex was adopted for service in 1983.
The SP-4 bottle-shaped rimless cartridge case completely hides the bullet. The long wad-piston is replaced by a small device in the form of a cup. The cylindrical bullet is made of the hard alloy and features on its upper part the brass band. By the moment when a bullet completely leaves the cartridge case its band reaches the muzzle end face and it seems as if the bullet propels itself along the rifled part of the barrel. The bullet penetrates at a range of 25 meters the armor vest of II level of protection and at a range of 30 meters penetrates a 5 mm steel plate.
The self-loading mode of operation with such a cartridge proved to be a considerable achievement (taking into account the inside pressure in the cartridge case) and demand¬ed an additional rifling of the barrel beginning from the cartridge chamber, the latter travels a little backward with recoiling slide and the rilled part shifts forward under the effect of a bullet. This reduces the contact of the car¬tridge case with cartridge chamber and enhances its extraction.
The firing mechanism of the hammer type ensures firing with self-cocking or with preliminary cocking and features thumb safety. The pistol grip constitutes a part of its rear receiv¬er to which are attached the plastic side-pieces. The magazine is of a one-row type.
The Tula-based Ordnance Plant (Armory) has launched the PSS and MSP pistols in production.
Specifications
Caliber………………………..7.62mm
Cartridge …………………………SP4
Pistol weight w/cartridges …………….0.88 kg
Pistol length…………………….165 mm
Barrel length……………………..35 mm
Muttle bullet velocity ……………..200 m/sec
Effective rate of fire ……………..6-8 rds/min
Sighting range……………………..50 m
Magazine capacity…………………..6rds
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