|Engine Power (hp)||245|
|Speed Limit (km/h)||48|
|Standard Shell Penetration (mm)||42 - 70|
|Standard Shell Damage||30 - 50|
|Rate of Fire (rounds/min)||18.8|
Development of this self-propelled gun on the basis of the M3 light tank started in October 1941. The first prototype passed trials in the spring of 1942, but the vehicle never saw mass production.