Proper noun
RPK
A Soviet 7.62×39mm cartridge light machine gun
From the AKM he developed a squad automatic weapon variant, known as the RPK ( Russian Ручной пулемет Калашникова main – Kalashnikov light machine gun). Source: Internet
In fact, many light machine guns (such as the Russian RPK ) are adaptations of existing automatic rifle designs. Source: Internet
Squad automatic weapons (such as the RPK and L86 ) are modified assault rifles or battle rifles (e.g. FN FAL 50.41 and M14A1 ) that may have increased ammunition capacity and heavier barrels to withstand continued fire and will almost always have a bipod. Source: Internet
In the 1960s, the Soviets introduced the RPK light machine gun, an AK-47 type weapon with a stronger receiver, a longer heavy barrel, and a bipod, that would eventually replace the RPD light machine gun. Source: Internet
Also included were PPSh-41 and RPK machine guns. Source: Internet