Leupold 1-Piece Mark 4 8-40 Adaptable Steel Scope Base 20 MOA – Winchester 70 SA – Matte Black

Leupold mounts are every bit as rugged and dependable as the Leupold optics they_re intended to secure. With a huge variety of mounting systems for nearly every type of firearm under the sun you_re sure to find the perfect match for you firearm and your style of shooting.

MOUNTING LARGE RIFLESCOPES ON LARGE CALIBER FIREARMS WITH CONVENTIONAL 6-48 SCREWS IS NOT IDEAL AS THE INCREASED RECOIL AND SCOPE WEIGHT CAN OVER-STRESS THE SMALLER SCREWS AND LEAD TO POSSIBLE FAILURES. MORE RUGGED 8-40 SCREWS INCREASE MOUNT STRENGTH BY 41%.

Leupold_s Mark 4 8-40 Adaptable Mount – lso available in a 20-MOA Long-Range Shooter version – is the first mount that can accommodate both the 8-40 screw and a modified 6-48 shoulder screw. Larger through holes accept the thicker 8-40 screw while the standard 6-48 screw has been replaced by a shoulder screw to work with the larger opening. This gives you the flexibility to mount your rifle with the common 6-48 screw size or drill and tap your gun to accept the 8-40 screws.

These bases will fit Winchester PBR Remington Super Magnum HS Precision and other 8-40 rifles without modification. (Some firearms will not work with these adaptable mounts)