The SS Evolution is a new and exciting replacement stock. This new lightweight drop-in from Boyds? is the first truly ambidextrous thumbhole stock and one that is sure to turn heads. For all its futuristic looks, however, the SS Evolution is a purely functional stock. The grip angle allows the hand to assume the most natural position, and the palm swell on either side provides the most comfortable grip possible. Also, there is no forend contact with the barrel, so this stock will accept all barrel contours whether lightweight, sporter, or varmint weight. The SS evolution is comletely inlet and ready to finish. This stock is inlet for all standard 10/22 actions and accepts both factory and aftermarket barrels.