T40/M9 Tank Destroyer

The 3" Gun Motor Carriage T40, later given the production model number M9 was a US tank destroyer (a self-propelled gun designed for fighting tanks), of the early part of World War II. It used a 3 inch gun on an M3 hull.

History
The T40 was the T24 prototype rebuilt by Baldwin Locomotive Works in 1941. The Japanese declaration of war against the US caused it to be accepted for production as the M40. However, the project was terminated in April 1942. The Tank Destroyer Board felt that the vehicle was too slow and the M1918 gun was not available in sufficient quantity.

Notes and references

 * http://www.wwiivehicles.com/usa/tanks-medium/m3.asp