They gave us ear plugs at Ord in '70, but they didn't tell us to put them in, so we didn't. We did have them displayed, in their plastic case, from the epaulets on our field jackets, but that was it. No safety glasses.
If you've never thought about it, the gas port in an AR bolt carrier vents both gas and noise, so the guy to my left on the firing line installed the tinnitus in my left ear. Muffed sport shooting since then shouldn't have done too much harm, but the ambient noise during cafeteria duty (I was a middle school teacher) can't have helped. (Side story; we used a decimeter to measure the noise the kids made; we also checked during a teachers' meeting; there wasn't much difference.) It wasn't that the kids, or the teachers, were deliberately screaming; just trying to be heard above the background noise was a challenge.
Moon