I spent 21 months in the Army (24 months minus 90 days "early out program" for combat) in (hmmm, it's hard to remember) 69 to 71?
I qualified with everything they'd let me shoot. M14, M16, 45, M60, grenade and quick kill. I think I'm leaving a couple things out. Quick kill was actually a Daisy BB rifle. That's where they toss the metal disc (like a silver dollar, but rusty) and you shoot it without aiming, just pointing. I qualified Expert with all of them. That was probably the only fun I had in the Army.