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Jupiter IV

122-mm self-propelled gun

Jupiter IV

The Jupiter IV is a combination of 122-mm field gun, mounted on a 6x6 truck chassis

Entered service 2006 (?)
Crew 6 men
Dimensions and weight
Weight ~ 17 t
Length (gun forward) ~ 13 m
Width ~ 2.75 m
Height ?
Main gun 122-mm
Barrel length 45-46 calibers
Machine guns -
Projectile weight ?
Maximum firing range 20 km
Maximum rate of fire ~ 4 rpm
Elevation range - 2 to + 65 degrees (?)
Traverse range ?
Ammunition load
Main gun ?
Machine guns -
Engine YaMZ-238 diesel
Engine power 240 hp
Maximum road speed ~ 70 km/h
Range ~ 450 km
Gradient 60%
Side slope 30%
Vertical step ~ 0.6 m
Trench ~ 0.6 m
Fording ~ 1 m


   The Jupiter IV is a Cuban combination of a Soviet M1931/37 (also known as A-19) 122-mm field gun, mounted on heavily modified KrAZ 6x6 truck chassis. This artillery system was first publicly revealed in 2006.

   This low-cost upgrade improved capabilities of an ageing field gun. Such developments are typical for countries with limited military funding.

    It is worth noting that Cuba developed a number of artillery systems using the same approach of merging existing but out-dated field guns and howitzers with various surplus chassis. There is a whole series of Jupiter artillery systems, based on KrAZ 6x6 trucks. A Jupiter V is a very similar Cuban artillery system. It uses the same heavily modified KrAZ 255B 6x6 chassis, but is armed with a 130-mm field gun. It was also publicly revealed in 2006. Also there are some other Cuban self-propelled artillery system, based on tracked chassis.

   The M1931/37 (A-19) field gun was developed in the Soviet Union in the late 1930s. It was produced from 1939 until 1946. It saw action during the World War II and remained in service long after the end of the war. These guns were exported to Soviet allies.

   This Cuban self-propelled gun can fire armor-piercing, High Explosive and Fragmentation (HE-FRAG) shells. Also Soviets had anti-concrete and chemical shells for this gun. Range of fire is 4 km with armor-piercing shells and up to 20 km with HE-FRAG shells.

   The gun is loaded manually. Maximum rate of fire is around 4 rounds per minute.

   It seems that this artillery system is operated by a crew of 6. In traveling order all crew members are seated in an unusual cab with separate compartments on each side of the engine.

   The Jupiter IV is based on a heavily modified KrAZ 255B chassis. Vehicle is powered by a YaMZ-238 turbocharged diesel engine, developing 240 hp. It is mated to a 5-speed manual gearbox. Vehicle has adequate cross-country mobility and can travel off-road.


Jupiter IV









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