When we went sightseeing up at the Plain Of Jars, we always took a bag of goodies. My favorite was an M-79 and the pilot liked his CAR-15 which was simply a shorty version of the M16. I had a bag I got from somewhere that held four 20-rd. clips for 16s. I ran into it several days ago and finally got the camera charged up to immortalize it. I picked it up at the AirAm  AOC (Air Operations Center) at Luang Prabang (Lima-54) in July 1970. It was manufactured in September 1959 according to the stamp on it.

I shot all the rounds in them years ago but kept the clips.

Check this out. Some enterprising individual was tasked with the responsibility of tagging clips containing  API (Armor-piercing incendiaries) with red paint. The green ones were armor-piercing (AP). I had a green clip too but I think my son in law has it now. I accidentally shot all the AP stuff on the Fourth of  July a number of years ago. Oh well.