PK & PKM Machine Gun
The PK is a 7.62 mm general purpose machine gun designed in the Soviet Union and currently in production in Russia. The PK machine gun was introduced in the 1960s and replaced the SGM and RPD machine guns in Soviet service. The PK machine gun can be used as a light anti-aircraft weapon when it is put on an AA mount. One feature typical of Soviet machine guns is that the standard model feeds from the right and ejects its spent cases via an ejection port on the left side of the weapon, as opposed to the right side ejection port seen in most Western machine guns
The original PK (Пулемёт Калашникова: Pulemyot Kalashnikova, or "Kalashnikov's Machinegun") was a development of Kalashnikov's automatic rifle design, firing the 7.62x54mmR Eastern Bloc standard ammunition originally from the Mosin-Nagant. It is equipped with a simple bipod and is designed as a squad-level support weapon; it is also suitable for installation and vehicle mounting. Most are belt-fed, using linked 25 round belts. These 25-round belts can be linked to any length necessary.
The PKM and other variants are in production in Russia and currently are exported to many nations. Additionally, various models are manufactured locally around the globe. Zastava Arms produces the PK under license as the M84 (along with the PKT as the M86), and it remains in use with many of the former Yugoslav successor states. The most recent modification is the Russian Pecheneg, which features a forced air cooling barrel that cannot be removed in the field for quick replacement, unusual for a modern machine gun.