In my FLETC class, they were used to teach students how to decock and unload revolvers. Apparently they used to do a fam-fire with the basic programs, but stopped that sometime before I got there.
They were also used as props for the crime scene and search warrant training.
Kind of broke my heart.
If I'm thinking of the same instance, that was a state LE agency, not a federal one.
Seperate issue, basically.