[Ruy Dias de Bivar]

So, the firearm used in the shooting was a real firearm and not a “prop”(fake) gun.

[Angelino97]

So, the firearm used in the shooting was a real firearm and not a “prop”(fake) gun.

Prop does not mean fake. Any item on a stage for actors to use is call a "prop" and is handled by the Props Dept.

A coffee mug used by actors in a scene is a prop, though it might be a real coffee mug.