Pez'tk-pattern fuel rod gun/Gameplay

The fuel rod gun is best used against armor at medium range and against enemy positions and gun emplacements at long range.

Campaign

 * The fuel rod gun in Halo 2 generally is rarely seen, thus you will not be able to use it often, an exception being on the Arbiter level where a multitude of Heretic Grunts use it against you when you are flying in a Banshee.
 * In Halo 3, the fuel rod gun appears far more frequently. The best thing to do with it is to give it to a marine, who then rides in the passenger seat of your vehicle. Marines can also lock on targets with fuel rod gun, even though the player cannot.

Multiplayer

 * In Halo: Combat Evolved for PC, the fuel rod gun is best used as a mortar to bombard the enemy base. It has an advantage of being able to hit enemies that are in cover and over hills, a feature otherwise only possible through the use of grenades. If the wielder uses it against vehicles, correct lead is essential. In Halo 2, the fuel rod gun does not appear in multiplayer, nor does in Halo 3 - however, it can be added through Forge.
 * Being an effective suppression weapon, one tactic in multiplayer Capture the Flag is to bombard the enemy base from afar with a fuel rod gun. Furthermore, the gunner can fire from a position obscured from enemy view, owing to the indirect-fire properties of the fuel rod gun. Since the view of the targeted area is mutually obscured from the gunner's position (due to having to compensate for the arc and having to aim high), such is unlikely to kill a player, but it is intended to at least deal cover fire for an assault on the flag, and most likely to inflict damage on the flag carrier. If multiple players carrying fuel rod guns bombarding a base with the aforementioned technique, it is quite devastating. Note that the fuel rod gun's splash damage is similar to that of the rocket launcher. If fired at very close range, the projectile will harm the player slightly.