That sucks. No experience with that gun. Did you try emailing the factory? Nothing like an explanation in broken English to give you more confidence in what you are doing. This is the guy I would try:
Chief Designer for Small Arms, Sporting and Hunting Weapons
Vladimir P. Budanov
tel.: +7 (3412) 68-97-87
fax: +7 (3412) 66-35-44
Good luck, Bill.