Place it at the action beat in a short edit, after the build-up and before the reaction cut. Follow it with the Pew Pew Sound Button for a return shot, then end on a reaction clip instead of stacking more effects.
About this sound
This is a one-second stylised gunshot effect built around the Japanese bakyun shot sound, delivered as a single sharp pop with no speech or music. It feels punchy and comic rather than realistic, giving a listener an instant jolt that lands like an exaggerated cartoon shot in a playful scene.