The designation M 4A 1 was applied to the M4 medium series to use an one-piece cast hull with a distinctive round shape. The up gunned M 4A 1 to mount an 76mm M1 high velocity gun and a T23 turret was different from the early M 4A 1 hulls as the hull front now spots two large hatches for the driver and the co-driver. The tank also had wet storage protection for the ammunitions hence the designation with the 'W ½. At first these tanks were not welcomed by the troops but they were used with success in the Operation Cobra following the D-Day invasion. The very early M 4A 1 (76)W had some minor differences to the later standard type. The kit can build to depict these early machines.