The Mexican government? The drug lords? LOL. In the case of the drug lords, they don’t need no stinking help from Chechnya, thank you. They can buy just about anything they want. Besides, the USA government has been friendly enough to the drug lords in this regard.
The mexican mafia gets most of there weapons from Solntsevskaya Bratva , a russian mafia organization that operates worldwide and there specialty is arms trafficking
http://latinamericacurrentevents.com/russian-mafia-connected-to-arms-trafficking-in-honduras/10335/