The MKB PK-10 is a Soviet-designed semi-automatic pistol, first introduced in the 1950s. It was developed by the TsKIB SOO (Central Design Bureau of Sporting and Hunting Weapons) and was primarily intended for use by the Soviet military, police, and intelligence agencies.

Here are some details about the MKB PK-10:

• Design and Features: The PK-10 has a distinctive design, being compact and reliable. It typically features a steel frame and a blowback mechanism. The pistol has a relatively simple construction, making it easy to maintain.

• Caliber: The MKB PK-10 was chambered for the 7.62×25mm Tokarev cartridge, which was common in Soviet pistols and submachine guns at the time.

• Capacity: The pistol typically has a 10-round magazine, which was a standard feature for pistols in that era.

• Operation: The blowback operation of the PK-10 means that the recoil of the fired round automatically ejects the spent cartridge and loads the next round into the chamber. It is a semi-automatic pistol, meaning it fires one shot per trigger pull.

• Use: The PK-10 was relatively short-lived in service, as it was soon replaced by more modern sidearms like the Makarov PM. Despite its limited service life, the PK-10 was notable for its effectiveness in certain specialized roles.

• Legacy: Though it didn't stay in service long, the PK-10 was an interesting piece of Soviet-era firearms history and represents the technological evolution of small arms during the mid-20th century.