Leupold BackCountry Cross-Slot Base Features The Leupold BackCountry Cross-Slot Base is machined from 7075-T6 aircraft grade aluminum making it one of Leupold s lightest and most rugged hunting style mounts. A milled in recoil lug locks the base against the receiver to resist shift under repeated recoil while a low profile keeper screw keeps the overall profile sleek and snag free. The cross-slot design forms a one piece Picatinny rail base that accepts both Picatinny and Weaver style rings giving hunters freedom to choose the ring height and style that fits their optic. Measuring 6.7 inches long and weighing just 2 ounces it adds minimal bulk to a long action hunting rifle. Purpose fit to the Nosler M21 long action this base mounts without modification and comes complete with the necessary mounting hardware for a straightforward installation. Finished in a matte black that matches most hunting rifle finishes it blends in rather than standing out on the rifle. Leupold builds every mount to the same standard of ruggedness as the optics they secure and this base is made in the USA with a lifetime warranty backing it. For Nosler M21 owners who want a dependable lightweight base ready for their next hunt the Leupold BackCountry Cross-Slot Base is available for sale at GrabAGun. Leupold BackCountry Cross-Slot Base Specifications Manufacturer: Leupold Model: BackCountry Cross-Slot Base Compatible Hosts: Nosler M21 Color: Matte Black Material: Aluminum Action: Long Style: Cross-Slot Rings Included: No Length: 6.7 Height: 0.4 Includes: Mounting Hardware Weight: 2 oz Available At: GrabAGun