My best friend (now a retired physician) was an Army Flight Surgeon at Ban Me Thuot (up in the Central Highlands). He was also a helicopter pilot. He was issued a S&W .38 Special but didn't remember if it was a Model 10 or a Model 15....probably a M-10 since he was Army. He said he also carried a Colt .45 Auto on missions, plus two (2) M-16's. I asked him why he carried 2 M-16's and he said they were having so much trouble with them at that time, he checked out an extra one from the armory whenever he went on a mission.