M3 Gun Motor Carriage

M3 Gun Motor Carriage
M3A1 GMC on display at the American Heritage Museum in Stow, Massachusetts, USA.
TypeTank destroyer
Place of origin United States
Service history
In service1941 – 1945
Used by United States
 Free France
 Imperial Japan
 Philippines
 Poland
 Soviet Union
 United Kingdom
WarsWorld War II
Production history
DesignerOrdnance Department
Designed1940 – 1941
ManufacturerAutocar Company
ProducedAugust–September 1941
February 1942 – April 1943
No. built2,202
(1,360 converted to
M3A1 Half-track)
Specifications
Mass20,000 lb (9.1 t)
Length20.46 ft (6.24 m)
Width7.29 ft (2.22 m)
Height8.17 ft (2.49 m)
(including gun shield)
Crew
5 men
  • Commander (Cab right)
  • Driver (Cab left)
  • Gunner (Rear left)
  • Assistant gunner (Rear right)
  • Loader (Rear)
Elevation
  • M3: 29° up, 10° down
  • M3A1: 29° up, 6.5° down
Traverse
  • M3: 19° left, 21° right
  • M3A1: 21° in both directions
Armor0.25–0.625 in (6.4–15.9 mm)
Main
armament
1× 75 mm (3.0 in) M1897A4 gun
(w/ 59 rounds)
EngineWhite 160AX, 386 in3 (6,330 cc), 6-cylinder, compression ratio: 6.44:1
147 hp (110 kW)
Power/weight14.7 hp/ton
TransmissionConstant mesh
SuspensionSemi-ellipitical longitudinal leaf spring for wheels and vertical volute springs for tracks
Ground clearance11.2 in (280 mm)
Fuel capacity60 US gal (230 L)
Operational
range
~ 200 mi (320 km)
Maximum speed 47 mph (75 km/h)

The M3 Gun Motor Carriage (M3 GMC) was a United States Army tank destroyer equipped with a 75 mm M1897A4 gun, which was built by the Autocar Company during World War II.

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