One of the guys I worked with at American Rifleman spent time in Vietnam. He said the array of weapons carried by the VC was amazing...
Standard Soviet and Chinese stuff, to be sure.
Lots of French weaposn, like Lebels, Betheriers, MAS 36s, MAT 49s and MAT 38s.
The oddest one they ever came across, though, was a Lee Enfield rifle that was being used with left-over Japanese 7.7mm ammunition (basically a copy of the .303 British).
"The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza
Baby Jesus cries when the fat redneck doesn't have military-grade firepower.