Not sure if it has the same hole in the bottom of the receiver that the Saigas do. I use a simple flathead screwdriver as a lever braced against the hole to pop the stock right out.
No, it doesn't have that extra hole as IZ-132's do. K-Var installs these stocks very securely, (with a press, I think). To remove it, first take out the mounting hardware, (screws both inside and outside the receiver), then get a good rubber/polymer mallet and whack on it about halfway down the top of the stock, (where it dips down slightly and then back up). That surface should allow you to hit the stock