|Engine Power (hp)||192|
|Speed Limit (km/h)||64|
|Standard Shell Penetration (mm)||42 - 70|
|Standard Shell Damage||30 - 50|
|Rate of Fire (rounds/min)||18.8|
Requirements to a light airmobile tank were created in the winter of 1941. The vehicle was developed by the Marmon-Herrington company. A total of 830 vehicles were produced from April 1943 through February 1944, 260 of which were supplied to the U.K. under Lend-Lease.