The vehicle was developed on the basis of the Churchill tank. The cabin with the 3-inch gun was placed in the front. Initially, 100 vehicles were ordered. Later, the order was reduced to 24 vehicles. Eventually, a total of 50 vehicles were manufactured from 1941 through 1942. However, they never saw action.
Time for the successive autoreloading of each shell into the magazine.
The technical characteristics shown are for the Siege mode
Characteristics are specified for a vehicle with crew members trained to 100%.