Gjallarhorn (ギャラルホルン, Gyararuhorun) is the first mini-album of Japanese rock band 9mm Parabellum Bullet released on December 8, 2005.

The song "Marvelous", as well as "Talking Machine" and "(Teenage) Disaster", were later re-recorded in The World e.p.. All lyrics are written by 9mm Parabellum BulletThis EP-related article is a stub.

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