The characteristically short two-stage barrel, with round forward stage and pronouncedly reinforced octagonal breech, late 14th century, ca. 1380-90, the staged figured stock probably early 15th c.
In the Historic Museum Moscow.
http://books.google.de/books?id=gUzp...barrel&f=false
The article originally published within the Osprey Book series,
Medieval Russian Armies 1200-1500. Please see further attachments.
Best,
Michael