It is a CZ 75 SP01 Shadow Viper. It is a normal 75 SP01 with a 6Inch Slide from Waffen Oschatz in Germany, Waffen Oschatz is one of the best Gunmakers for CZ in the Region Germany, Austria and Switzerland! My CZ has the 6Inch Slide, Match Sights, SAO Trigger, a long Guide Rod for the Slide Spring and the Nill Grips.
http://www.waffen-oschatz.de/cz-75-sp01-shadow-viper/