As of this post we have the Vortex PST 5-25x50 FFP MOA in stock ready to ship. Its been quite some time since these hit the shelves, and didnt just ship to backorders. I would advise acting quickly as I don't have many, and no one else has any.
VIPER® PST GEN II 5-25X50 FFP RIFLESCOPE EBR-2C
VIPER® PST GEN II 5-25X50 FFP RIFLESCOPE EBR-2C