Plasma Cannon

Were you looking for:
 * Type-42 Directed Energy Support Weapon, the Halo 2 version of the Plasma Cannon.
 * Type-52 Directed Energy Support Weapon, the Halo 3 and Halo: Reach version of the Plasma Cannon.
 * Class-2 Energy Gun, weapons mounted on many Covenant vehicles.
 * Plasma turret, a Covenant starship-mounted weapon.