The cheque given to Marisol has two different amounts, the printed and PAY ONLY say 2,000,000 and the the PAY in smaller print says 3,000,000.
Mickey asks the pawnshop clerk to show him the "9mm with a silencer". Sound suppressors, known as "silencers" are restricted accessories and federal law requires a license to purchase, possess, or sell one. No pawnshop would ever have one for sale, let alone one attached to a pistol in a display case.
Dimitri is supposedly the head of the Russian mafia, but he speaks English without a trace of a Russian accent.