These rails are compatible with both Picatinny and Weaver scope rings. The Winchester 70 Long Action Picatinny rail is also compatible with the Marlin XL7 rifle.
4 screws; 2 x 6-48×1/4 (rear) and 2 x 6-48×3/16 (front) are included.
20″ lbs torque is recommended and a drip of “blue” loctite (not supplied).