Winchester XPR Dual Dovetail 2 Piece Base Matte Finish by Leupold Optics offers the Winchester XPR Dual Dovetail 2 Piece Base Matte Finish. The Dual Dovetail bases are forged and machined from high quality steel and finished to a beautiful sheen. The mounts are designed by Leupold to fit the Winchester XPR rifle. Leupold Dual Dovetail mounts are shipped with both 8-40 and 6-43 screws. Specifications and Features: 8-40 and 6-43 Screws Forged Steel Expert Finish Two Peice