|This article is about a/an weapon in Kamen Rider Kabuto.|
- Gun Mode (ガンモード Gan Mōdo), the default mode, fires high-intensity ion beam blasts and is equipped with tri-laser targeting called DAT Sight (ダットサイト Datto Saito). Its finishing attack is an ionic energy blast called the Avalanche Shoot (アバランチシュート Abaranchi Shūto). Kabuto most often uses this Mode in Masked Form, but occasionally uses it in Rider Form.
- Ax Mode (アックスモード Akkusu Mōdo) becomes active when the gun barrel is held, and is wielded by using the bladed butt of the weapon like a tomahawk. Its finishing attack is the Avalanche Break (アバランチブレイク Abaranchi Bureiku). Kabuto most often uses this Mode in Masked Form.
- Kunai Mode (クナイモード Kunai Mōdo) activates when the gun barrel is detached, unsheathing a short-dagger weapon good for its swift and easy handling; this is favored most when Kabuto switches to Rider Form. This mode's finishing attack is the Avalanche Slash (アパランチスラッシュ Abaranchi Surasshu).
Although he typically uses his Ride Booker in place of it, Kamen Rider Decade can access the Kabuto Kunaigun when transformed into Kabuto via his Kamen Ride Card. He used it while fighting the Go-Busters.
The Kabuto Kunaigun is the Arms Weapon wielded by either an Armored Rider or a New Generation Rider when they transform into Kabuto Arms, which is assumed by Kamen Rider Zangetsu in Kamen Rider Battle: Ganbarizing.