How a PB(silent pistol) works

The PB (Russian: Пистолет Бесшумный, romanized: Pistolet Besshumnyy, lit. 'Pistol Silent', English: Silent Pistol; GRAU index 6P9) is a Soviet integrally suppressed semi-automatic pistol developed and manufactured by Izhevsk Mechanical Plant, based on the Makarov pistol; since the merger of Izhevsk Mechanical Plant and Izhevsk Machine-Building Plant to form Kalashnikov Concern, it has continued to be manufactured by Kalashnikov Concern. It entered service in 1967.

The PB uses an integral suppressor, which, unlike most similar systems, consists of two parts. This allows the pistol to be carried and kept concealed without the front section of the suppressor attached, and for the suppressor to be quickly deployed prior to use. The pistol may also be fired safely without the front section attached, which may be important in critical situations. When fired like this, the PB sounds similar to a regular Makarov pistol. The detached suppressor is carried in a special compartment of the holster, which was designed especially for the PB.

https://en.wikipedia.org/wiki/PB_(pistol)

PB(silent pistol): full disassembly & assembly
   • PB(silent pistol): full disassembly &...  

Don't try to recreate what you see in this video, as this is gameplay. This video was created using the game World of Guns:
http://store.steampowered.com/app/262...
This game is also available on Google Play, App Store, Amazon and other platforms.