MSNBC: the reason the charges against Alec Baldwin were dropped,

[Kaleva]

29. A working gun is dangerous no matter where it is

You are confusing prop gun with real guns. Real guns were used on the set

"Are Prop Guns Real Guns?
The first issue is with all the media outlets calling the gun used in the shooting a “prop gun.” Make no mistake: the gun used in the shooting was a real gun. For as long as there have been movies, scenes with gunfire in them have used real guns. That’s the only way to get the flash of the powder, the bang of the ignition, and the recoil in the actor’s hands. Of course, for safety’s sake, these guns are loaded with blanks. A blank gives all of the above, but without the bullet. It doesn’t make a blank non-lethal, but it does make it less lethal.

These real guns get called prop guns because they get lumped into all of the other accessories used by actors in the course of filming a movie. But make no mistake: they are very much real guns."

https://www.ffl123.com/are-prop-guns-real-guns/