Systema Engineering announce the PTW 2012 Final Evolution Series for Law Enforcement/Military and Civilian markets. There are changes to make them  even more realistic in terms of handling and they also added the Magpul MBUS rear sight in some of the models... "The one and only Professional Training Weapon was developed back in 2003 as vital training tool for Close Quarter Training/Battle (C.Q.B.); after various improvements it was formally adopted into the U.S.