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203-mm self-propelled howitzer

M110A2 SPH

The M110 was the most powerful self-propelled howitzer in service with the US Army

Entered service 1961
Crew 5 men
Dimensions and weight
Weight 28.35 t
Length (gun forward) 10.73 m
Hull length 5.72 m
Width 3.15 m
Height 3.14 m
Main gun 203-mm
Barrel length 25 calibers
Machine guns -
Projectile weight 92.53 kg
Maximum firing range 17 - 29 km
Maximum rate of fire 1 rpm
Elevation range - 2 to + 65 degrees
Traverse range 60 degrees
Ammunition load
Main gun 2 rounds
Machine guns -
Engine General Motors 8V71T diesel
Engine power 405 hp
Maximum road speed 55 km/h
Range 520 km
Gradient 60%
Side slope 30%
Vertical step 1 m
Trench 2.3 m
Fording 1.2 m


   Development of the M110 self-propelled howitzer began in mid-1950s. The first prototype, known as the T-236, was built in 1959. The M110 entered service with the US Army and US Marine Corps in 1961. It was produced for a long period of time and was exported to a number of countries. The M110 was the most powerful self-propelled howitzer in service with the US Army. This artillery system saw action during Vietnam War, Operation Desert Shield and Desert Storm. It has now been retired from the US Army service. Current operators are Egypt, Greece, Iran, Japan, Morocco, Pakistan, South Korea, Spain, Taiwan and Turkey.

   The M110 is fitted with the M2A2 203-mm / L25 howitzer. This howitzer was developed from the British 8 inch howitzer, used during World War I. The M110 is fitted with load assisting system to reduce crew workload. It fires HE-FRAG and nuclear projectiles. Maximum range with the standard HE-FRAG projectile is 17 km. Maximum rate of fire is only one round per minute. Sustained rate of fire is one round every two minutes. The M110 carries only 2 rounds. Ammunition is carried by escorting armored personnel carrier.

   The M110 can stop and fire the first round from travelling within one minute.

   This artillery system carries no defensive armament, except individual weapons carried by the crew.

   This self-propelled howitzer has a crew of 13, however only 5 men are carried by the M110. Support crew of 8 men are carried by an escorting armored personnel carrier, which also transports ammunition for this SPH.

   This self-propelled howitzer is based on the same universal tracked chassis as the M107 175-mm self-propelled gun. Vehicle is powered by a General Motors 8V71T supercharged diesel engine, developing 405 hp.




   M110A1, improved variant of the M110, fitted with a longer M201 203-mm / L37 howitzer. It entered service in 1971. Maximum range of fire was increased to 27 km. This self-propelled howitzer fires newly developed rocket-assisted, cluster projectiles, nuclear and chemical projectiles;

   M110A2, improved variant of the M110A1. It entered service in 1978 and was fitted with double muzzle brake. Maximum range of fire was increased to 29 km.


Video of the M110A2 self-propelled howitzer

M110 SPH

M110A2 SPH

M110A1 SPH

M110A2 SPH

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