The Kinetic Research Group X-Ray Chassis Rear Stock is now available separately as an upgrade for your previous generation (1-3) X-Ray or Bravo chassis. Works great if you want to lighten up the backend of your Whiskey-3 while maintaining the excellent ergonomics. It will fit all generations of chassis noted below. Fits: All generations of Whiskey-3, X-Ray Chassis, Bravo chassis (with the exception of the 10/22 Bravo); for Rem 700SA/LA, Tikka T3, Howa 1500, CZ-457 inlets of KRG chassis.