PK

The PK is a general purpose machine gun chambered in 7.62x54mmR.

PK
Пулемёт Калашникова, romanised as Pulemët Kalashnikova meaning "Kalashnikovs machine-gun". It is belt fed, gas operated and air cooled. Firing from an open bolt it is capable of only automatic fire. It also features inter changeable barrels. Designated PKS when tripod mounted, versions with optic mounting side rails are designated PKN and PKSN accordingly.

PKM
Пулемёт Калашникова Модернизированный, romanised as Pulemët Kalashnikova Modernizirovannyj meaning "Kalashnikovs machine-gun, modernized". A modernised version of the PK design, it is essentially a lighter version. Changes include a redesigned feed tray cover, a thinner non fluted barrel, shorter flashider and a new butt stock featuring a shoulder support. Designated PKMS when tripod mounted, versions with optic mounting side rails are designated PKMN and PKMSN accordingly.

PKT
Modified for use as the coaxial gun on Soviet/Russian main battle tanks. Features a longer barrel, modified gas block and a firing solenoid replacing the butt stock and trigger.

PKMT
A PKT based on the PKM version of the design.

PKB
A PK attached to a special mount for use inside of APCs and Armoured cars. Also used on Mi-8 Hip transport and Mi-24 Hind attack helicopters on window and door mounts.

PKMB
A PKM installed on the same mount

Airsoft Versions
There are no serial production models of this weapon in airsoft, allthough some enthusiasts have made their own from deactivated weapons.

There are also some limited run versions that are quite poor replicas:
 * HAG PKM
 * Trapper PKM

Related Articles

 * PKP Pecheneg

Links
PK @ Wikipedia

PK @ world.guns.ru

PKB @ kalashnikov.guns.ru