Ruger Stock Adapter, Fits Ruger American Rimfire, 10/22 and any Ruger rifle w/the Modular Stock System, High Comb/Standard Pull, Black 90432 Ruger's Stock Module" High Comb/Standard Length of Pull" fits Ruger American Rimfire" 10/22 and any other Ruger rifle with the Modular Stock System. This comb is intended for use with aftermarket scopes or mounted sights. The high comb height raises the shooter's cheek placement" putting the eyes in line with the mounted optics. It has the standard length of pull. Genuine Ruger Factory Accessory. 1.84" Comb Height" 13.75" Length of Pull.