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M107 American 175mm Self-Propelled Gun (SPG)

M107

Self-Propelled Gun (SPG)
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Basic Information
Name
M107 American 175mm Self-Propelled Gun (SPG)
Designation
M107
Alternate Designation
M107
Equipment Type
Self-Propelled Gun (SPG)
Manufacturer
FMC Corp., Bowen-McLaughlin-York, General Motors Corp
Date of Introduction
1979
Description

The M107 175mm self-propelled gun was used by the U.S. Army from the early 1960s through to the late 1970s. It was part of a family of self-propelled artillery that also included the M110. It was intended to provide long-range fire support in an air-transportable system. It was exported to several other countries including Germany, South Korea, Spain, Greece, Iran, Israel, Italy, the Netherlands, the United Kingdom, and Turkey. The M107's combat history in U.S. service was limited to the Vietnam War; it also saw extensive combat use in Israeli service. The M107 shared many components with, and in many cases was replaced by, later versions of the M110 8-inch howitzer. Although withdrawn from U.S. service in the late 1970s, it continues in service with some armies as of 2019.

Ground Specifications
Crew 5
Engine Diesel (345 hp)
Active Protection None
NBC Protection Yes
Range 720.0 km
Variants
M110 this is basically the same chassis, mounting a 203 mm howitzer instead of a 175 mm gun. Because both the M107 and M110 are fully-modular and thier weapons are easily interchangeable, M107s frequently became M110s - and vice-versa - in armies that operated both weapons.
System
Alternative Designation M107
Type Self-Propelled Gun (SPG)
Manufacturer FMC Corp., Bowen-McLaughlin-York, General Motors Corp.
In Service 1962-1984 (United States) The M107 is still in service in some armies.
Family M107
Crew 5 + 8 men
Chassis M107/M110 chassis
Displacement Time INA
Emplacement Time 3 min
Resupply Truck The remainder of the crew (8 x Soldiers) rode in accompanying M548 tracked cargo carriers or M992 FAASVs, some of which carried additional ammunition and supplies.
Dimensions
Length, Gun Forward 11.25 m
Length, Hull 3.45 m
Width 3.15 m
Height 3.47 m
Weight, Combat 28.2 tons
Ground Pressure 0.82kg/cm²
Automotive
Engine Name General Motors 8V71T
Engine Type Diesel
Engine Power 345 hp
Maximum Range 720 km
Speed, Maximum Road 56 km/h
Speed, Average Cross INA
Speed Maximum Swim Not Amphibious
Gradient 60 deg
Side Slope 30 deg
Vertical Step 1 m
Trench 2.36 m
Fording Depth 1 m
Fuel Capacity 1,100 liters
Communications
Primary INA
Main Gun
Note The dominant recognition feature of the M107 is its 175 mm gun, which is thin, extremely long, and has a bull barrel. The gun sits atop a carriage in a slot that allows the tube to recoil rearward. This carriage is attached to a rotating mount at rear of the chassis, while the front of the carriage is attached to a pair of tall, narrow gun carriage cheeks by a pair of long pneumatic struts.
System
Name M113 or M113A1 Gun
Type 175 mm
Weapon Mount M158 mount
Breech Type Welin-step thread
Length, Barrel 60 calibers
Loader Type Manual
Maximum Rate of Fire 2 rds/min
Normal Rate of Fire 1 rd/2 min
Maximum Firing Range 40 km
Muzzle Brake Type No Muzzle Brake
Max Elevation +65 deg
Min Elevation -2 deg
Traverse Range 60 deg
Traverse Left 30 deg
Traverse Right 30 deg
Barrel Life 700 to 1 200 rounds
Recoil System Hydropneumatic
Recoil Length 711-1,778 mm
Fume Extractor No
Ammunition (Option 1)
Name M437A1
Type HE
Caliber 175 mm
Projectile Length 867 mm
Projectile Weight 66.78 kg
Muzzle Velocity 914 m/s
Fuse Type INA
Basic Load 2 projectiles stored on the vehicle, with a Ammo resupply truck and 8 Soldiers positioned nearby.
Ammunition (Option 2)
Name M437A2
Type HE
Caliber 175 mm
Projectile Length 867 mm
Projectile Weight 66.87 kg
Muzzle Velocity 913 m/s
Fuse Type INA
Basic Load 2 projectiles stored on the vehicle, with a Ammo resupply truck and 8 Soldiers positioned nearby.
Fire Control
Name INA
Computerized FCS No
Thermal Sight Vehicle Commander Infrared night vision devices
Thermal Sight Gunner Infrared night vision devices
Main Gun Stabilization Yes, hydraulically deployable spade.
Sights M115 panoramic sight
Protection
Hull Armor 20-mm (estimated) for the driver only
Turret Armor INA
Applique Armor No
Explosive Reactive Armor No
Active Protection System No
Mine Clearing No
Self-Entrenching Blade Yes, the hydraulically deployable spade can be used as a dozer blade.
NBC Protection Yes
Smoke Equipment INA
Details
Country of Origin United States
Category Self-Propelled Gun/Howitzer Artillery Systems
Land > Artillery > Self-Propelled Gun/Howitzer Artillery Systems
Filter Label
M
Classification
Domain
Ground
Equipment Status
Active
Dimensions
Length
Width
3.15 m
Height
3.47 m
Weight
28200 kg
Operators (5)
South Korea
Turkey
Iran
Greece
Vietnam
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