Teodor,
Just go there:
http://museummilitary.com/ru
and order #4 and #7: these are Kirill's books on Caucasian weapons.
I hope your Russian is good enough to navigate the site.
I have spare copies of #4: history of Caucasian warfare and weapons. If you need one, send me a PM.
#7 just came out: more of a technical one, pinpointing details attributable to certain times and localities of manufacture . Very useful.
Ariel