You should read about this guy's "crime" before making that call. He drove across the Mexican border with a box of cartridges in his car. No big deal here; landed him in prison there. That's why he can't get his firearms privileges returned to him.
Seems to me that we should not trust Mexico's or any other foreign nation's felony standards. After all, you can commit pedophilia in Thailand and still be considered a legal citizen when coming back. This is ludicrous.
To Mexican government it was big deal. Five months in jail.