Blackhawk / Knoxx Thumbhole Stocks
Knoxx (now part of Blackhawk) have launched a thumbhole variant of their recoil dampening Talon (shotgun) and Axiom (rifle) stocks.
The Talon is available for the Remington 870, Mossberg 500 and Winchester 1300. The Axiom is available for the Remington 700, Howa 1500 and Weatherby Vanguard.
Murdoc has more info about the Talon and Axiom over at GunPundit.

Knoxx needs to come up with something for the Saiga 12.
I think this is a very cool idea, and I actually like the way it looks with this new design.
I was interested in these until I ran into Zak Smith’s opinion after evaluating one–his opinion: absolutely terrible for accuracy.
The Mossberg 500 Knoxx Spec-ops stock can be readily adapted to the Saiga 12. Just google “knoxx saiga”