I figure that the paper pictures will eventually be discarded, but the digital ones should stay on here for the kids.
The rifle range at Camp Lejuene, North Carolina in the summer of 1979. All Marines had to qualify with the rifle once a year, no matter what their MOS (military occupational speciality.) Camp Lejeune maintained the ranges used by the main base, by New River Air Station, and by Camp Geiger.
It was always hot and humid, and there was a lot of pressure. Competition among shooters to qualify as "Expert" was intense. It may give you some idea just how intense, to know that the badge for "Marksman", the lowest passing qualification, was universally known as the "toilet seat."
The rifle is the M16A1. It was a good rifle, with none of the frills they have today. But it was the precursor to all the fancy versions. I actually liked the M14 better. When I went through OCS in 1973, the M16A1 was general issue in the fleet, but the M14 was still issued at OCS (officer candidate school.)
There may have been carbine style M16's in use in the late 70's, but I never saw one. Officers and crew served weapons Marines carried the Colt M1911A1 pistol.
Infantry officers often carried the rifle as well as the pistol, since not having the rifle on the battlefield indicated to the opposition that you might be someone worth shooting.
Every Marine in those days was trained as a rifleman. Even the women qualified on the range, although they were not allowed in combat billets back then. However, there was always the possibility of being overrun, and then it's all hands to the pumps.
Two friends of mine. On the left is a WM Captain, Gloria Moyer. On the right is a Warrant Officer, Frank Foster. After I left Okinawa I never ran into either of them again, but that's how the military is.