This Ruger Modular Stock System Stock Module 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 shorter length of pull buttstock, ideal for shooters that prefer a shorter length of pull. Fits any Ruger rifle with the Modular Stock System including selected 10/22 and Ruger American Rimfire rifles. Genuine Ruger Factory Accessory. 1.84'' Comb, 12.50'' Length of Pull.