From what I have seen, gen 2 will be int he title. They just recently started feeling orders. I assume Cabelas has their old Gen 1 on sale to make room for the new shipment. Do a search on here for knoxx. There is a link in one of them to several places that have the latest model.
The Gen 2 has a redesigned spring system to help from the springs coming unhooked as well as a remolded plastic to better protect the shooter from the bad cheek slap.