US Patent 7124529 Axially displaced gun stock recoil system

An axially displaceable gun stock recoil system (10) centered around an elongated axial shaft member (20) mounted for reciprocation relative to a butt plate member (30) having a threaded distal end (23) disposed within an elongated recess (101) in the butt of a gun stock (100) wherein, a pair of spring biasing elements (40) (50) of the butt plate member (30) and the main spring biasing element (40) is operatively disposed between the butt plate member (30) and a bearing plate member (60) that is received within a recoil pad (200).