3 inch Gun Motor Carriage M10

3 inch Gun Motor Carriage M10

The 3 inch Gun Motor Carriage M10 design was standardised in June 1942 and production begun in September. It was based on the chassis of the Sherman Tank with the M7 3 inch gun being carried in an open topped turret with full 360° traverse. There were two variants, the M10 with a diesel engine and the M10A1 with a petrol engine. It saw service in Italy and North West Europe especially with the Canadian and Polish anti-tank units. The 3 inch Gun was replaced bit by bit with the British 17 pounder anti-tank gun.

Gun 3 inch M7


Length of Bore150 inches (50 calibres)
Rifling28 grooves, uniform Right Hand 1/40
Breech MechanismVertical sliding block, semi-automatic, percussion fired


Firing AP Shot M79

Muzzle Velocity2,600 feet per second
Maximum Range12,770 yards
Penetration at 2,000 yards/30°2.5 inches (64 mm)

Firing APC/BC HE-T Shell M62

Muzzle Velocity2,600 feet per second
Maximum Range16,100 yards
Penetration at 2,000 yards/30°1.7 inches (76 mm)

Firing HE Shell M42

Muzzle Velocity2,800 feet per second
Maximum Range14,780 yards

HVAP Shot M93

Muzzle Velocity3,400 feet per second
Maximum Range13,100 yards
Penetration at 2,000 yards/30°3.9 inches (98 mm)

Carriage M10


Height114 inches over AA machinegun
Width120 inches
Length235.1 inches without gun
Weight Loaded65,200 lbs
Maximum Speed30 mph (48 km/h) on road
Range M10
200 miles (320 km)
160 miles (260 km)


The Royal Artillery 1939-45