The Directional Resonance Guns (指向性共振銃, Shikōsei Kyōshin Jū?) is a type of specialized gun.


It is still unknown where it came from.


They are guns used against ability users. It produces a sound wave which directly shakes up the brain, causing a loss of consciousness in one second and death in ten seconds [1]


  1. Bungo Stray Dogs Manga: Chapter 72.

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