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Land ForcesUnited States

M110

203mm self-propelled howitzerFielded 1961Pending verification
Land ForcesUSA
Identification silhouette. Not drawn to scale between entries.
Fact cardConfidence · Source
System
Type203mm self-propelled howitzer
Date of introduction1961
ProliferationAt least 12 countries
ManufacturerGeneral Motors Corp.Med[1]
Crew5Med[1]
Displacement time1 minMed[1]
Emplacement time1 minMed[1]
Dimensions and weight
Width3.15 m10 ftMed[1]
Combat weight31.2 tMed[1]
Automotive performance
Chassissame universal tracked chassis as the M107 175 mm self-propelled gun.Med[1]
Engine1 x Detroit Diesel 8V-71T EngineMed[1]
Engine power805 hpMed[1]
Cruising range523 km325 mi · 282 nmiMed[1]
Max road speed55 km/h34 mph · 30 ktMed[1]
Cross-country speed15 km/h9 mph · 8 ktMed[1]
Fording depth1.2 mMed[1]
SuspensionTorsion bar, 5 road wheels, front drive, last road wheel acts as rear idler, shock absorber on each roadwheel, no return rollers ability to lock suspension out when firing rear-mounted hydraulic spade for bracing firing platform.Med[1]
Protection
Hull Armor20-mm maximum (estimated)Med[1]
NBC ProtectionYesMed[1]
Armament
Rate of fire (max)2+ rd/minMed[1]
Max elevation+65 degMed[1]
Min elevation-2 degMed[1]
Main armamentM201A1 Howitzer, 203mm HowitzerMed[1]
Maximum firing range30 km19 mi · 16 nmiLongest-range ammunition listedMed[1]
Fire control
Thermal Sight Vehicle CommanderInfrared night-vision equipmentMed[1]
Thermal Sight GunnerInfrared night-vision equipmentMed[1]
Variants
M110A1improved 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, c[1]
M110A2improved 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.[1]
Weapons and payload options · 3Confidence · Source
HERA203 mm ammunition
Med[1]
Range
30 km19 mi · 16 nmi
Quantity
2 ea
Muzzle velocity
710 m/s
Projectile weight
90.78 kg
Fuze
INA
DPICM203 mm ammunition
Med[1]
Range
22.5 km14 mi · 12 nmi
Quantity
2 ea
Muzzle velocity
711 m/s
Projectile weight
96.6 kig
Fuze
INA
HE203 mm ammunition
Med[1]
Range
21.3 km13 mi · 12 nmi
Quantity
2 ea
Muzzle velocity
713 m/s
Projectile weight
92.53 kg
Fuze
INA
Summary

The self-propelled M-110 203 mm howitzer first entered service with the US Army in 1963. The vehicle itself transports only two projectiles and five men, while the remainder of the ammunition and the crew is on board a tracked M548.

Draft entry. Values come from the cited public sources and are awaiting editor verification.
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Operators
United StatesAzerbaijanBahrainEgyptGreeceIranJordanJapanSouth KoreaMoroccoPakistanTürkiye
Sources
  1. M110 American 203mm Self-Propelled Howitzer (SPH), U.S. Army TRADOC G-2 Worldwide Equipment Guide (ODIN)
    Published/updated 2026-03-20 · Tier 1 · checked 2026-10-10
Change log
  • 2026-10-10 Entry created from the Worldwide Equipment Guide (ODIN), bulk import