It is the final album to feature Stefan Kaufmann and Igor Gianola .
Rev - Raptor is the 13th studio album by the German heavy metal band U.D.O. , released on May 20 , 2011 , by AFM Records .
Rev - Raptor is the final studio album to feature Stefan Kaufmann and Igor Gianola .
Rev - Raptor is the 13th studio album by the German heavy metal band U.D.O. , released on May 20 , 2011 , by AFM Records .