Vehicle Features/Mounted Weapons

Since Grand Theft Auto series introduced armed vehicles, they also introduced Vehicle mounted Weapons, which act in a special form that is very comparable to some basic Weapons, with the exception that they are usually stronger and posseses infinite ammunition. Although many of these lack a HUD, it doesn't applied to Grand Theft Auto 2 and Grand Theft Auto V, where it can be selected like conventional weapons.

Certain weapons that appear in most cases are the Tank Cannons, Machine Guns and Mounted Rockets. The Water Cannon isn't considered a mounted weapon, but it's included because it still does a minimal damage and can sometimes atract the police.

Description
These weapons are available at the player only in a specified vehicle and can save a large amount of ammunitions in combat situations. There are light firepower weapons for accuracy, close combat and small number of enemies, and heavy firepower weapons, which is best suited for serious combat, large group of enemies and vehicular destruction, where is usually important in the arsenal.

These weapons will disable basic weapons for Drive-By Shooting, thought is not necesary in these cases. If the vehicle is destroyed, these weapons becomes unusable.

Grand Theft Auto 1 and Expansions

 * Water Cannon: Can be found on every Fire Truck. It creates a large splash that can extinguish fire and can knock and even kill people, but has a minimal damage.


 * Tank Cannon: Found only mounted in Tanks, the Royal Pain (London 1969) and the Tiger Tank (London 1961). Can fire a powerful explosive projectile that can easily destroy several objectives in a few shots. However, they have a slow rate of fire.

Grand Theft Auto 2

 * Water Cannon: Can be found on every Fire Truck. It creates a large splash that can extinguish fire and can knock and even kill people, but has a minimal damage.


 * Heavy Machine Gun: Found on the Armed Land Roamer. It can be shot unidirectionally (in the vehicle's orientation) and also in a fast Rate of Fire. The disadvantage is that is somewhat weak.


 * Tank Cannon: Found only mounted in Tanks. Can fire a powerful explosive projectile that can easily destroy several objectives in a few shots. However, they have a slow rate of fire.

Grand Theft Auto III

 * Water Cannon: Can be found on every Fire Truck. It creates a large splash that can extinguish fire and can knock and even kill people, but has a minimal damage.


 * Built-in Machine Gun: Seen on the Predators, this weapon is moderately powerful and fast, though the disadvantage is that is prone to reloading, due to an "overheat".


 * Tank Cannon: Found only mounted in every Rhino. Can fire a powerful explosive projectile that can easily destroy several objectives in a few shots. However, they have a slow rate of fire.

Grand Theft Auto:Vice City

 * Water Cannon: Can be found on every Fire Truck. It creates a large splash that can extinguish fire and can knock and even kill people, but has a minimal damage.


 * Built-in Machine Gun: Seen on the Predators, this weapon is moderately powerful and fast, though the disadvantage is that is prone to reloading, due to an "overheat".


 * Chain Gun: Found in the Sea Sparrow and the Hunter, this weapon only shoots unidirectionaly, however it can "track" any pedestrian and shoots in a limited angle, making it easy to kill. It seems to be powerful and can destroy a vehicle quickly.


 * Tank Cannon: Found only mounted in every Rhino. Can fire a powerful explosive projectile that can easily destroy several objectives in a few shots. However, they have a slow rate of fire.


 * Mounted Rocket: Founded only in the Hunter, it fires a rocket that acts like a Rocket Launcher, with a high damage and moderate rate of fire.

Grand Theft Auto:San Andreas

 * Water Cannon: Can be found on the Fire Truck (1st variant) and the SWAT Tank. It creates a large splash that can extinguish fire and can knock and even kill people, but has a minimal damage.


 * Built-in Machine Gun: Seen on the Predators, this weapon is moderately powerful and fast, though the disadvantage is that is prone to reloading, due to an "overheat".


 * Chain Gun: Found in the Sea Sparrow, Hunter and the Rustler, this weapon only shoots unidirectionaly, however it can "track" any pedestrian and shoots in a limited angle, making it easy to kill. It seems to be powerful and can destroy a vehicle quickly.


 * Tank Cannon: Found only mounted in every Rhino. Can fire a powerful explosive projectile that can easily destroy several objectives in a few shots. However, they have a slow rate of fire.


 * Mounted Rocket: Found in the Hunter and the Hydra. It fires a rocket that acts like a Rocket Launcher, with a high damage and a moderate rate of fire. The Hydra variant can lock-on.

Grand Theft Auto Advance

 * Water Cannon: Can be found on every Fire Truck. It creates a large splash that can extinguish fire and can knock and even kill people, but has a minimal damage.


 * Tank Cannon: Found only mounted in the Tank. Can fire a powerful explosive projectile that can easily destroy several objectives in a few shots. However, they have a slow rate of fire.

Grand Theft Auto:Liberty City Stories

 * Water Cannon: Can be found on every Fire Truck. It creates a large splash that can extingish fire and can knock and even kill people, but has a minimal damage.


 * Built-in Machine Gun: Seen on the Predators, this weapon is moderately powerful and fast, though the disadvantage is that is prone to reloading, due to an "overheat".


 * Chain Gun: Found in the Hunter, this weapon only shoots unidirectionaly, however it can "track" any pedestrian and shoots in a limited angle, making it easy to kill. It seems to be powerful and can destroy a vehicle quickly.


 * Tank Cannon: Found only mounted in every Rhino. Can fire a powerful explosive projectile that can easily destroy several objectives in a few shots. However, they have a slow rate of fire.

Grand Theft Auto:Vice City Stories

 * Water Cannon: Can be found on every Fire Truck. It creates a large splash that can extinguish fire and can knock and even kill people, but has a minimal damage.


 * Chain Gun: Found in the Sea Sparrow and the Hunter, this weapon only shoots unidirectionaly, however it can "track" any pedestrian and shoots in a limited angle, making it easy to kill. It seems to be powerful and can destroy a vehicle quickly.


 * Built-in Machine Gun: Seen on the Predators, this weapon is moderately powerful and fast, though the disadvantage is that is prone to reloading, due to an "overheat".


 * Chain Gun: Found in the Hunter, the Sea Sparrow and the Little Willie, this weapon only shoots unidirectionaly, however it can "track" any pedestrian and shoots in a limited angle, making it easy to kill. It seems to be powerful and can destroy a vehicle quickly.


 * Tank Cannon: Found only mounted in every Rhino. Can fire a powerful explosive projectile that can easily destroy several objectives in a few shots. However, they have a slow rate of fire.


 * Mounted Rocket: Found only in the Hunter, it fires a rocket that acts like a Rocket Launcher, with a high damage and moderate rate of fire.

Grand Theft Auto IV and Episodes From Liberty City

 * Water Cannon: Can be found on every Fire Truck. It creates a large splash that can extinguish fire and can knock and even kill people, but has a minimal damage.


 * Minigun: Found on the Annihilator and the Buzzard. This weapon has a high rate of fire and it's moderately powerful. In GTA IV, the Annihilator has a low rate and is prone to reloading, and in EFLC, the Annihilator has explosive bullets and the Buzzard has faster minigun and doesn't overheat.


 * Explosive Cannon: Only seen on the APC, this weapon acts like a faster Explosive Shotgun and requires few shots to knock or destroy vehicles.


 * Mounted Rocket: Found only in the Buzzard (TBoGT), it fires a rocket that acts like a Rocket Launcher, with a high damage and moderate rate of fire.

Grand Theft Auto: Chinatown Wars

 * Water Cannon: Can be found on every Fire Truck. It creates a large splash that can extinguish fire and can knock and even kill people, but has a minimal damage.


 * Machine Gun: Seen mounted on the Coast Guard Launch, this weapon can easily destroy weak boats and has a decent rate of fire.


 * Tank Cannon: Found only mounted in every Rhino. Can fire a powerful explosive projectile that can easily destroy several objectives in a few shots. However, they have a slow rate of fire.


 * Torpedo Launcher: Only seen on the back of a Destroyer, this weapon fires in a straight direction and has a slow reload, but can easily destroy well armored boats with few shots.

Grand Theft Auto V

 * Water Cannon: Can be found on every Fire Truck. It creates a large splash that can extinguish fire and can knock and even kill people, but has a minimal damage.


 * Machine Gun: Found in Buzzards, Annihilators and P-996 Lazers, this weapon has average damage and can easily destroy vehicles. P-996 Lazers' MGs has shorter range, but adds explosives on it, so can destroy vehicles even faster.


 * Tank Cannon: Found only mounted in every Rhino. Can fire a powerful explosive projectile that can easily destroy several objectives in a few shots. However, they have a slow rate of fire.


 * Mounted Rocket: Found on the Buzzard and the P-996 Lazer, it fires a rocket that acts like a Rocket Launcher with a high damage and moderate rate of fire. Also has lock-on hability on both vehicles.

Trivia

 * Along with these weapons, there are at least some unusable weapons:
 * The ICBM's missile on the back (London 1969).
 * The Launch's Rear MG on the rear end (San Andreas).
 * The Rhino's roof mounted MG and a Co-axial MG (GTA V).
 * The JB 700 also has mounted weapons (Machine Guns). However, these are only available in Pack Man.