Production of the 105 mm Howitzer M7 Self Propelled Priest began in April 1942. The first vehicles were built on the M3 Lee chassis but as the Lee was suplanted by the Sherman, production switched to the M4 chassis. The open topped fighting compartment mounted the M2A1 105 mm Howitzer. They first saw action with the British at the second battle of Al Alamein. They continued in British service through to 1945. They started to be replaced by the 25 pdr SP Sexton as it became available but continued to serve, mostly in the Far East.
Gun
| M2A1 | Modified M2 standardised in 1940 |
Carriage
| M7 | Open topped compartment on M3 Lee tank chassis. Howitzer on Mount M4 |
| M7B1 | As M7 but based on M4 Sherman chassis |
Data – Carriage
| Weight | 50,40 lbs (22.97 metric tons) |
| Length | 19 feet 9 inches (6.02 m) |
| Width | 9 feet 5 inches (2.87 m) |
| Height | 8 feet 4 inches (2.54 m) |
| Speed | 24 mph (39 km/h) on road, 15 mph (24km/h) cross country |
| Operational range | 120 miles (193 kms) |
Data – Gun
| Length of Bore | 93 inches (22.5 calibres) |
| Rifling | 34 grooves, uniform right handed 1/20 |
| Breech & Mechanism | Horizontal sliding block, percussion fired |
| Recoil system | Hydropneumatic, constant 42 inches |
Ammunition – Semi-fixed, cased charge
| Shell, semi-fixed, HE, M1 | Streamlined shell weighing 33 lb |
| Shell, semi-fixed, Chemical, M60 | White Phosphorus smoke |
| Shell, semi-fixed, Chemical, BE, M84 | Base ejection smoke |
| Shell, HEAT, M67 | Hollow charge with base fuze M62A1 |