At DaNang I occasionally flew O-2Bs with the 9th SOS and we were issued 4-inch M-15s with our survival vests. From 1975-1977 I flew C-141s then transitioned to C-5s from 1977-1991. As Aircrew we carried either 2-inch M-10s or M-15s depending on what Command Post had available. In RVN we carried FMJ but as Aircrew we carried three rounds of bean bag loads and three rounds of JHP. Even though we carried snubs we qualified with 4-inch M-15s.