I did this work for Evegoplayon. In this project, I only worked on texturing and rendering.
One texture set 4096x4096 was used here.
Manville gun was a stockless semi-automatic, revolver type gun, introduced in 1935 by Charles J. Manville. The Manville Gun was a large weapon, with a heavy cylinder being rotated for each shot by a clockwork-type spring. The spring was wound manually during the reloading.