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Land ForcesUnited States

M110A1

203mm self-propelled howitzerFielded 1977Pending verification
Land ForcesUSA
Identification silhouette. Not drawn to scale between entries.
Fact cardConfidence · Source
System
Type203mm self-propelled howitzer
Date of introduction1977
ProliferationOrigin country only
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
Chassischassis identical to the M110'sMed[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 road wheel, 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]
Turret 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 armamentM201 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
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 M110A1 American 203mm Self-Propelled Howitzer (SPH), is a variant of the M110 American 203mm Self-Propelled Howitzer. Versions of the M110 with the longer barrel are the M110A1 (no muzzle brake) and the M110A2 (fitted with muzzle brake).

Draft entry. Values come from the cited public sources and are awaiting editor verification.
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Operators
United States
Sources
  1. M110A1 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