I’ve read that the AK was better equipped for battle in Vietnam than our guys guns.
The AK-47 was probably superior in most regions of Vietnam where there was heavy jungle or forest and engagements were at very close range and conditions were harsh
The high velocity 55 gr 5.56 bullet was far more easily deflected by foliage than the low velocity 121 gr 7.62 bullet of the AK 47 and at short range the better ballistics and better long accuracy of the M-16 were moot and more than offset by the higher rate of fire and better reliability of the AK