Model from Warlord Games.
From Wikipedia: The Sturmgeschütz III (StuG III) assault gun was Germany’s most produced armoured fighting vehicle during World War II. It was built on the chassis of the proven Panzer III tank, replacing the turret with a fixed casemate and mounting a more powerful gun. Initially intended as a mobile, armoured light gun for direct-fire support for infantry, the StuG was continually modified and was widely employed as a tank destroyer.
I’ll update this gallery as work continues. Having a blast modifying the original.