The Open Range series is a collection of lightweight 6061-T6 aluminum mounts built to outperform their price. With milled-in recoil lugs and low-profile keeper screws Open Range rings firmly connect to both Picatinny- and Weaver-style bases. These Open Range cross-slot rings fit any riflescope with a 30mm maintube. - Nothing is more crucial than the link between your scope and firearm. That's why our mounts are every bit as rugged and dependable as the Leupold optics they secure. And with a huge variety of mounting systems to choose from you're sure to find the perfect match for your firearm and style of shooting. Made in the USA and guaranteed to hold up to a lifetime of abuse Leupold mounts will never let you down.