Here we see an excellent photo of a Vietnamese Ranger of the ARVN clad in sandals, shades and an nón lá “rice hat” over his U.S.-supplied duck hunter/frog lizard camo uniform (which was popular at the time among irregular units around Indochina). Armed with a similarly surplus M1911 .45 in his belt as well as what looks to be a French MAS 38 SMG over his shoulder, he sports binos and a commercial transistor radio for the latest in Saigon-based AM stations.
Note the more traditionally-equipped ARVN infantry behind him, armed with M1 Garands.
Speaking of which, this beauty came from a recent blog post over at the “WWII After WWII” blog examining M1 Garand use in Vietnam.