This paper model is a 2S19 Msta-S, a self-propelled 152 mm howitzer designed by Russia/Soviet Union, which entered service in 1989 as the successor to the SO-152, the papercraft is created by Robototehnik, and the scale is in 1:50.
The 2S19 "Msta-S" is based on the T-80 tank hull, but is powered by the T-72's diesel engine. The Msta is a modern howitzer designed for deployment either as an unarmored towed gun, or to be fitted in armored self-propelled artillery mountings. Current production of the towed model is designated Msta-B, while the self-propelled model is the Msta-S (also known by the GRAU index 2S19). For further information please click here.
You can download the papercraft model here: 152 mm Howitzer 2S19 Msta-S Free Paper Model Download [Box] [Gavitex]