The APB (Avtomaticheskij Pistolet Besshumnyj - automatic silenced pistol) is a further development of the Stechkin APS automatic pistol. APB has been developed by 1972 for Soviet Spetsnaz and KGB units, and has been widely used in Afghanistan and later conflicts. It seems that all APB pistols were reworked from earlier Stechkin APS pistols. The APB, with the silencer fitted, is as loud as a non-silenced .22 caliber pistol, and is very accurate and controllable, especially with the shoulder stock fitted. One can easily achieve multiple hits at ranges of 25 meters and beyond in full automatic mode, firing bursts of 2 - 4 rounds, as seen on the picture above.

The basic action of the APB is the same as in APS pistol, but the barrel is drilled to decrease the muzzle velocity, and is enclosed in the tubular jacket, which extends forward from the slide and has grooves to accept the quick-detachable silencer interface. The clumsy and heavy holster/shoulder stock of the APS is replaced by the much more convenient detachable shoulder stock, made of steel wire. Pistol is usually carried in the special leather holster, with the separate pouch for silencer and shoulder stock.