Is the LCT LPPK-20 AEG Vityaz SN or PPK-20? Alexander of Red Army Airsoft goes into details of this AEG. The LCT LPPK-20 is a steel replica of the Vityaz submachine gun from Russia. It has a plastic stock with a RIS rail for accessories, and a hinged bolt cover with another RIS rail on top. The stock can be adjusted to six positions and folded to the side. It also has several sling mounts and a new ergonomic grip made of polymer.