This paper model is a ZiS-3 cannon, a Soviet 76.2 mm divisional field gun used during World War II, the paper model was designed by Patero, and the finished model by Yoda. The scale of the paper cannon is in 1:16.
ZiS was a factory designation and stood for Zavod imeni Stalina, the honorific title of Artillery Factory No. 92, which first constructed this gun. For more information please click here.
You can download the papercraft model here: WWII Soviet Cannon 76 mm Divisional Gun M1942 (ZiS-3) Free Paper Model Download