I am one hell of a big guy, and that seemed to be the criteria for an M60 gunner (that wasn't what I went to AIT for, but most of us weren't in the MOSs we were trained for). I was hand receipted for the tripod, T&E, spare barrel, and tool bag, but again in practice, what we carried was mission specific. Again, the book vs the real world. When you are on a five day combat patrol you carried everything. Raid patrols, bare minimum. In an understrength platoon, I had an A-gunner sometimes, sometimes not.