Adolf Hitler had ordered the StuG III Ausf F to be developed so that the German Wehrmacht would retain superiority over the Soviet KV-1s and T-34s.6
The chassis was similar to the StuG III Ausf E.1
An additional exhaust fan was installed in the roof to remove gun fumes.1,6 Early in production the superstructure was modified to improve protection.
The mantlet was changed to make room for the larger recoil of the 7.5 cm gun.6
Was introduced in early 1942 with the 7.5cm StuK 40 L/43.1 The 75 mm gun fired a 15 lb HE with a muzzle velocity of 2,461'/sec to a range of 7,767 yards.3
Usually had rounded muzzle brake.4