As a heads up, these are not PSL stocks. They are Romanian thumbhole stocks for AK pattern rifles, usually added for import reasons. See the WUM-1 AK for reference.
Thank you very much for the info. I have both PSLs and a Romanian equivalent WUM. These don't fit the WUM and even when i tried to fit one to the WUM it was impossible to make it work without separating the grip from the stock.