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 your firearm and your style of shooting. The rugged, 8-40 screws increase mount strength by 41 percent. Also available in a 20-MOA Long-Range Shooter model that can accommodate both the 8-40 screw and a modified 6-48 shoulder screw, for greater mounting flexibility. Fits Winchester PBR, Remington Super Magnum, H-S Precision, and other 8-40 rifles without modification. Note: Some firearms will not work with these adaptable mounts. Check current offering for details.