The AK-47 is a common weapon seen used by several NVA troops and several camp guards. The AK-47 was widely used by the Communist manufactured by the Soviet Union and distributed to Vietnam. The NVA liked the AK-47 because the AK-47 was one of the first true assault rifles and, due to its durability, low production cost and ease of use, the weapon and its numerous variants remain the most widely used assault rifles in the world — so much so that more AK-type rifles have been produced than all other assault rifles combined.
Mosin Nagant
The NVA in the watchtowers use Russian Mosin Nagants.
Norinco Type 56
Several NVA who escort prisoners are armed with Norinco Type 56s.
RPK
The NVA who executes the Communist lady is armed with an RPK light machine gun with the bipod removed. A goof is that the RPK changes into an RPD in the next shot.
RPD
Due to continuity errors, the RPK switches to an RPD when the camera gets closer to the old woman before she is executed.