PB
The silent self-loading pistol (silent pistol, Index 6P9) was developed by designer A.A. Deryagin with the use of elements of the PM and adopted for service in 1967.
The PB features a two-section silencer. The muzzle is provided with a jacket-expan¬sion chamber. The operation of such an inte¬gration silencer is based on the preliminary escape of the exhausted gases from the bar¬rel bore, thereby reducing the pressure of powder gases and velocity of the bullet (up to 290 m/sec, that is lower than the sound velocity). The chamber is located on the front part of the pistol barrel-slide, powder gases are escaping from it through grooves rifled at the bottom of the barrel-slide. Between the slide and the barrel there is a jacket roll of
metallic gauze to absorb the temperature of exhausted gasses. The detachable unit is fixed to the front part of the chamber which constitutes a silencer unit-nozzle housing with a separator with several washers arranged at various angles of inclination. In the chambers of the nozzle the exhausted gases are being separated, expanded and gradually lose its velocity and temperature.
The barrel-slide is shortened. The main¬spring is vertically set in the pistol grip and connected via a rocking lever with the bar¬rel-slide.
The barrel-slide stop is actuated by a button.
The detachable nozzle unit is designed to carry the pistol in the compact holster on the waist-belt.
Specifications
Caliber …………………………9mm
Cartridge ……………………..9×18 PM
Weight w/o cartridges……………….0.97 kg
Length w/o silencer………………..170 mm
Length w/silencer…………………310 mm
Muale bullet velocity…………….. 290 m/sec
Effective rate of fire………………30 rds/min
Sighting range …………………….50 m
Magazine capacity…………………..8 rds
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