M4 Earn a Silent Assasin ranking on all of the St. Petersburg missions up to and including ''Invitation to a Party'' without any aggression. Pass ''Invitation to a Party'' last and you will recieve the M4.

Sawed off shotgun Achieve a Silent Assassin rating twice.

Silenced Ballers You will receive ''Silenced Ballers'' after gaining 'Silent Assassin' ranking for the first time in the game.