In November 1942, two M4A4 pilot Shermans were modified to carry the 105mm howitzer for close-support work. In 1943, the design was standardized and M4 and M4A3 versions were put into production.
A total of 800 M4s were built between February and September 1943. Then, 500 M4A3 versions were further built between April and August 1944.
As further refinements were made to the Sherman design, the Horizontal Volute Suspension System (HVSS) was incorporated into the M4A3 (105mm). This made it much easier to replace damaged road wheels, and the new, wide track improved the tank's off-road performance. Together, this gave the M4A3 (105mm) HVSS a much improved ride and far better flotation over soft ground.
Designed by Evan Allen
Painted by Blake Coster