The Skull Magnum (スカルマグナム Sukaru Magunamu) is Kamen Rider Skull's firearm and only weapon. When the Skull Memory is set into the Skull Magnum's Maximum Slot, and then the gun is set to its Maximum Mode (マキシマムモード Makishimamu Mōdo), it initiates the Skull Memory's Maximum Drive: a series of powerful energy bursts called the Skull Punisher (スカルパニッシャー Sukaru Panisshā). Skull typically uses the Magnum in Maximum Mode, but in Kamen Rider × Kamen Rider OOO & W Featuring Skull: Movie War Core, Skull Crystal wields the weapon in its Normal Mode (ノーマルモード Nōmaru Mōdo).