I want to share my photos of one of my favorite handgonnes - famous handgonne from Tabor. Barrel is cylidrical (not conical). Total length is 420 mm. Calibre is 20 mm (Many sites says that calibre is 17-18mm but it is wrong. My own measurements and measurements of Makovskaya says that calibre is 20 mm). I will share my plans of this later
I am working on it now.