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Rock Island Arsenal M198


Towed 155mm Heavy Howitzer


United States | 1979



"The M198 howitzer succeeded the 1930s-era M114 155mm howitzers in U.S. military service during the latter stages of the Cold War."

Power & Performance
Those special qualities that separate one land system design from another. Performance specifications presented assume optimal operating conditions for the Rock Island Arsenal M198 Towed 155mm Heavy Howitzer.
None. This is a towed artillery piece.
Installed Power
11,278 miles
18,150 km
Range
Structure
The physical qualities of the Rock Island Arsenal M198 Towed 155mm Heavy Howitzer.
10
(MANNED)
Crew
40.5 ft
12.34 meters
O/A Length
9.2 ft
2.79 meters
O/A Width
9.5 ft
2.9 meters
O/A Height
15,792 lb
7,163 kg | 7.9 tons
Weight
Armament & Ammunition
Available supported armament, ammunition, and special-mission equipment featured in the design of the Rock Island Arsenal M198 Towed 155mm Heavy Howitzer.
1 x 155mm gun barrel.
AMMUNITION:
Dependent on ammunition carrier.
Variants
Notable series variants as part of the Rock Island Arsenal M198 family line.
XM198 - Prototype and Trials Model Designation
M198 - Production Designation
Authored By: JR Potts, AUS 173d AB | Last Edited: 07/08/2019 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site; No A.I. was used in the generation of this content.

The medium size M198 replaced the well reguarded M114 that was developed in the 1930's. A continuing need to upgrade howitzers that could send projectiles down range at increased distances and have excellent elevation for over head plunging fire was the M198. This upgrade also needed adaptability to accept and fire all types of NATO 155 mm rounds by the contractor, the Rock Island Arsenal. Additional ammunition offered for the M198 include anti tank mine rounds, laser guided shells designed for stationary or moving targets, high explosive anti personnel grenades, illumination rounds, smoke and tactical nuclear round out the diverse weapon package.

With the Viet Nam war winding down the first prototype XM198 started testing trials. In 1979 the US Army received their first battalion delivery of 18. Soon after, the U.S.M.C. and Australia and some Middle Eastern armies placed battalion size orders.

The M198 is not a self propelled howitzer and is towed by a 5 ton truck that is used to carry the 9 man crew with supplies and ammunition. Other wheeled vehicles in the U.S. motor pool can handle the M198 along with the air mobility arm using the US Army Chinook CH-47C and the U.S.M.C. Super Stallion CH-53E. The howitzer is slung underneath for transport or be dropped by parachute to support ground forces.

The major parts of the M198 is the split tail carriage using an upgraded suspension system, The 155mm cannon is the M199 that uses a screw type breech and a thermal warning device. To fire the platform is lowered to the ground and the wheels are raised off the ground. Along with the split tail carriage this gives three point stability. The fire control system uses the M137 panoramic telescope.

In a combat role the M198 was used in the Middle East and Lebanon. With continued improvement programs the M198 is the standard 155 mm howitzer for the US Army and the US Marine Corps and will be used into the 21st Century.

Ranges for the M107 and M540A1 (rocket-assisted) projectiles is reported to be 19,850 yards and 32,810 yards repectively. Elevation is -5 degrees up to +72 degrees with a traverse of 45 degrees. A rate-of-fire of 4 rounds-per-minute can be achieved along with 2 rounds-per-minute sustained.

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Operators
Global customers who have evaluated and/or operated the Rock Island Arsenal M198. Nations are displayed by flag, each linked to their respective national land systems listing.

Total Production: 1,650 Units

Contractor(s): Rock Island Arsenal, USA
National flag of Australia National flag of Bahrain National flag of Ecuador National flag of Iraq National flag of Lebanon National flag of Morocco National flag of Pakistan National flag of the Kingdom of Saudi Arabia National flag of Somalia National flag of Thailand National flag of Tunisia National flag of the United States

[ Australia (retired); Bahrain; Ecuador; Honduras; Iraq; Lebanon; Morocco; Pakistan; Puntland (Somalia); Saudi Arabia; Tunisia; Thailand; United States (retired) ]
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Image of the Rock Island Arsenal M198
Image from the United States Department of Defense imagery database.

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The Rock Island Arsenal M198 Towed 155mm Heavy Howitzer appears in the following collections:
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