Blaser's R8 Professional Success Stock Receiver was designed to deliver superior ergonomics and enhance the shooter's accuracy. It utilizes a unique thumbhole design, this provides an improved grip on the rifle when compared to traditional stocks, as the shooter can slip their thumb through the stock instead of wrapping their thumb overtop of the stock. The thumbhole aperture is considerably large for a relaxed shooting posture in virtually any shooting position and allows the user quick access to the R8's cocking/un-cocking lever. Features of the Blaser R8 Professional Success Stock Receiver: Thumbhole for enhanced ergonomics Durable and lightweight synthetic polymer construction Rubber inlays ATZL trigger Blaser R8 Pro Success Green RH Stock Receiver w/ATZL Trigger a0820S10ATZL