Introducing the Ruger American Gen 2 Comb Riser Kit, the Ruger American Rifle Gen II stock features a comb riser to adjust the height of the comb for improved sight alignment. The rifle ships with the Low comb installed which adds 1/2''to the comb height, appropriate for many shooters using mid-power magnified optics. This comb riser kit provides additional comb height to present the shooter's eye directly behind the sight. One comb in the kit adds 5/8''to the comb height; the other adds 3/4''to the comb height. Combs are easily changed by loosening the recoil pad assembly and sliding the comb off. FeaturesTwo comb sizes included, (1) 5/8" and (1) 3/4"Helps maintain proper cheek rest at different height levelsEasy to install Note: A 1/8''hex wrench or similar tool is required to loosen the rear swivel stud to change combs.