Brownells Winchester 70 Long Action picatinny scope bases provide a rugged, one piece design provides a rock-solid base for scope rings with greater flexibility than traditional ring-and-base systems. Slots cut to true MIL-STD 1913 specs accept both Picatinny and many Weaver-style rings to increase your scope-mounting options on both tactical and sporting rifles. Easily alter the spacing between the rings to accommodate different-length scope bodies, and adjust eye relief to fit the specific needs of each shooter. Installs quickly using factory drilled scope base holes and screws-no drilling and tapping on most guns. Underside of base is cut out to accommodate receivers with right- Mfg: Brownells