Original sentence: Twin-wheeled bogies were mounted externally, and rubber-bushed and rubber-shoed track proved.durable on roads
Edited sentence: About 100 M2A1 were eventually built at the Rock Island Arsenal.Chrysler opened a new tank plant, the Detroit Tank Arsenal, to manufacture the M2, and the US Government contracted in August, 1940 for 1,000 vehicles to be produced.Events in Europe made obvious that the M2 was obsolete, and the government cancelled the contract before production began.Initially designated the T5, the redesigned model was redesignated as the M2 Medium Tank in June, 1939.It was powered by a Wright nine-cylinder radial engine.Rock Island Arsenal started work on a new medium tank, based on the design of the M2 Light Tank.Twin-wheeled bogies were mounted externally, and rubber-bushed and rubber-shoed track proved durable on roads