Gan Gun Saber

The 4-Mode Change Gan Gun Saber (４モード変形ガンガンセイバー) is a sword-like multiform weapon wielded by Kamen Rider Ghost. It made its first ever appearance in episode 47 of Kamen Rider Drive. It is summoned from either the Ghost Driver or the Eyecon Driver G by Ghost.

Modes
The Gan Gun Saber has four basic modes along with three additional modes it can access by combining with a specific Ghost Gadget. Each mode is compatible with a different Damashii form that Ghost assumes. In addition, the weapon can be summoned before Takeru transforms by summoning the Ghost Driver. This allows Takeru to defend himself before transformation or use it to remove obstacles or objects. Should the weapon be destroyed, Takeru can simply summon it again from the Ghost Driver.

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 * Blade Mode (ブレードモード): The default mode, primarily used in Ore Damashii. Later on, Ghost uses Blade Mode alongside the Sunglasseslasher's Sword Mode when using Toucon Musashi Damashii.
 * Naginata Mode (ナギナタモード): While assuming Ore Damashii, Ghost can detach one half of the Gan Gun Saber's twin-sided blade and then connect it to the bottom of the hilt. First appears in episode 4.
 * Nitouryu Mode (二刀流モード) : After transforming into Musashi Damashii, Ghost separates the Gan Gun Saber's twin-sided blade into dual one-sided swords. First appears in episode 1.
 * Gun Mode (ガンモード): After transforming into either Edison Damashii or Billy the Kid Damashii (though also briefly seen used by Ore Damashii when chasing the Giant Denki Gamma), Ghost tilts the Gan Gun Saber's hilt down and then rotates the top half of its twin-sided blade to reveal a gun barrel. First appears in episode 2.

Finishers
The Gan Gun Saber uses different names for its Omega Drive finishers, with each one corresponding to an alternate mode. To activate them, Ghost must scan the Energy Eye Crest (エナジーアイクレスト) on his Gan Gun Saber's hilt with the Ghost Eyecon currently placed within his Ghost Driver in a process known as Eye Contact (アイコンタクト).
 * Omega Break (オメガブレイク): Blade Mode
 * Omega Stream (オメガストリーム): In Naginata Mode, Ghost charges each weapon's bladed end with swirling blue energy before he presses the trigger on its handle to rapidly slash the target with both blades.
 * In Episode 7, Ghost used this finisher assuming Musashi Damashii in an attempt to destroy Insect Ganma but missed.
 * Omega Slash (オメガスラッシュ): In Nitouryu Mode, Ghost batters the opponent with his weapon's blades as they charge up energy before he presses the trigger on its handle when he's in position to cut down the opponent to make the charge be expelled upon the last hit.
 * In episode 6, Ghost combined this finisher with Musashi Damashii's Omega Drive to create a supercharged slash that also generated smaller energy blades that continue to slash at the opponent after the initial one.
 * Omega Shoot (オメガシュート): In Gun Mode, Ghost charges energy into the muzzle of his weapon before unleashing a powerful shot. If this finisher is used while in Edison Damashii, it can be enhanced with electrical energy.
 * Omega Strike (オメガストライク): In Arrow Mode, Ghost pulls on the energized "bowstring" of his weapon which makes an array appear to shield him from incoming attacks. Once charged, Ghost lets the energized arrow fly and pierce its target with great force.
 * In episode 4, Ghost combined this finisher with Robin Damashii's Omega Drive to create a ring of functional Kamen Rider Ghost Robin Damashii copies when the Book Ganma tried to confuse the Rider by cloning himself and running around in a circle.
 * Omega Impact (オメガインパクト): In Rifle Mode, Ghost charges an energy bullet as the Bat Clock winds its clock and projects an energy construct of a scope lens to lock on to the target. Once the clock hands point at the muzzle of the gun barrels and the energy is fully charged, the Rifle fires a powerful shotgun blast which destroys the target.
 * Omega Bomber (オメガボンバー): In Hammer Mode, Ghost charges energy to the Kumo Lantern, then slams the weapon on the ground, generating energy constructs shaped like the weapons found on the Face Seven Arms faceplate, which are then flung at the opponent. When Ghost uses this finisher in his Toucon Benkei Damashii form, he creates a flaming version of the finisher.
 * In episode 10, Ghost combined this finisher with Benkei Damashii's Omega Drive to create a super charged Hammer Mode strike after lifting himself in the air by spinning the Gan Gun Saber fast enough to take to the air, then slammed the Hammer onto the hapless Seiryuto Ganma.
 * An alternate version of the finishers above is the emotion-powered finishers of Mugen Damashii, done by pulling and pushing the Ghost Driver once. The resulting finisher may vary depending on the Gan Gun Saber's mode.
 * Kanashimi Break (悲しみブレイク): Blade Mode
 * Yorokobi Stream (喜びストリーム): Naginata Mode
 * Ikari Slash (怒りスラッシュ): Nitoryu Mode
 * Isama Shoot (勇シュート): Gun Mode
 * Tanoshii Strike (楽しいストライク): Arrow Mode
 * Shinnen Impact (信念インパクト): Rifle Mode
 * Love Bomber (ラブボンバー): Hammer Mode