Complex sentence: The German's possessed such a gun in the 75 mm PaK 40, and also had access to a large number of captured Soviet 76 mm F-22 Model 1936 divisional field guns.
Split into simpler sentences: The German's possessed such a gun in the 75 mm PaK 40. They also had come into possession of a large number of captured Soviet 76 mm F-22 Model 1936 divisional field guns.