発砲

1. Origins, structure, and basic meaning

• Structure: 発砲 (はっぽう) is an action noun, used with する, for discharging a firearm.
• Basic usage: むやみに発砲してはならない prohibits reckless shooting by a guard, while 劇中の発砲音 denotes a gunshot sound within a performance that startles the audience.

2. Common pitfalls and similar expressions

• Actual firing and staged sound
  • 発砲する is the act of firing, whereas 発砲音 is the resulting or staged sound. The second alone does not establish that a live round was discharged.