The Variable Ammunition Repulsion Impact Spitfire (VARIS) (ヴァリス, Vu~arisu) is a special armament designed exclusively for the Z-01 Lancelot and its successors, serving as its primary means to engage the enemy in long range combat. A revolutionary weapon based on railgun technology, it fires beam-like rounds. By changing the configuration of its barrel (aka. Impact Rail) between Normal Mode (straight beams) and Burst Mode (spherical beams), it can adapt the repulsion force applied on the projectile to suit any combat situation. It boasts destructive power far greater than that of the coilgun-based Assault Rifles used by other Knightmare Frames.
The Lancelot Albion is equipped with two upgraded versions of the VARIS. This improved version of the rifle includes two barrels, one which serves as a machine gun, and a second firing high-powered shots. These barrels can also seperate to reveal a Hadron Cannon.