The Kinetic Research Group Large Grip Panel Set is for those with larger sized hands. A large palm swell and ergonomic shape make for one of the most, if not the single most comfortable stocks available. These grips were what came on the generation 1 and 2 Whiskey-3 Chassis as it shipped and bolt directly onto those generations. They bolt directly onto the Gen 3 and 4 chassis and the X-ray Chassis as well using the included spacer. Includes both right and left grip panels plus the needed spacer.