The men making the buy work for a Russian gangster named Maxim Kutkin.  He's a small timer who's made a name for himself by brokering arms deals for people like Vezirzade.  I should add that he also happens to be Lukyan Barsukov's son-in-law.  Barsukov runs the Moscow "authority" - the largest criminal operation in Russia.  They call him the "Russian Godfather".  With connections like Vezirzade and Barsukov, Kutkin's star is definitely on the rise.