Something worth noting about Hollywood props is how “blanks” work in prop guns. Blanks might not fire a projectile that will kill you (unless you press the gun directly against your head, as actor Jon-Erik Hexum tragically did in 1984). Since the gun is still firing something, the gun still gets physically hot.

Which is how poor Al Pacino managed to accidentally burn one of his hands while filming Scarface. He grabbed a prop gun by the barrel that had just been firing blanks, and it burned his hand badly enough that production was shut down for several weeks so his hand could heal.