Ceremonial riles are inoperable as part of SOP....has nothing to do with any POTUS.
Not exactly.
When I was 15, in JROTC, we were given live M1 Garands and blanks to fire in funerals and other ceremonies. They were 100% operable rifles, not plugged or capped off with anything. We weren't old enough to drive cars, but we were "trusted" to not go crazy and shoot up things with our live battle rifles. (And none of us ever did.)
Certainly, we didn't go to anything like any inaugurations, but we were just kids.
It really does seem like a different world, though. People just didn't go crazy and shoot up schools back then. It was not something that had really ever happened. It wasn't something that people imagined happening.

