Assault cannon

The Assault Cannon is a Covenant directed energy weapon which is used by the Lekgolo (or Hunters). It is a variation of the more common fuel rod cannon in the fact that it fires a continuous beam of plasma as opposed to the single shots. Its ammunition comes in the form of incendiary gel tubes called Fuel Rod Cells. . The weapon is located on the right "arm" of the colony, built into the Lekgolo that make up the limb.

In Halo: Combat Evolved it fired a single shot, whereas the "new" Assault Cannon fires a singular, more deadly stream of plasma which can be moved in direction as it is being used.

Trivia

 * In Halo:Combat Evolved, the cannons needs to be charged up, firing single explosive plasma shots, whereas in both Halo 2 and 3 it is capable of firing a continuous beam. These sometime looked similar to a overcharged plasma pistol volley.
 * Some people belive the Scarab's main gun is just an enlarged version of the Assault cannon due to the similartites of the Charge up and the colour of the beam.