Leupold Open Range Features The Leupold Open Range Rimfire Base is machined from aluminum and built as a one-piece unit giving rimfire shooters a solid mounting foundation without the need to drill or tap their receiver. Designed specifically for rifles with an 11mm or 3/8 inch dovetail rail the base slips onto compatible rimfire actions and accepts any size cross-slot rings giving shooters flexibility in ring selection. Leupold positions this base as a high-quality alternative to the ring mounts supplied by many rimfire rifle manufacturers built to Leupold s own manufacturing standards. Its single-piece design also simplifies installation compared to multi-piece base systems. Finished in a matte black that resists glare and blends cleanly with most rimfire rifle finishes the Open Range base is built for shooters who want their mounting hardware to disappear visually while performing reliably. Because it uses a no-tap dovetail mounting method the base preserves the factory receiver without permanent modification an important consideration for shooters who want to maintain their rifle s original condition. This base suits .22 rimfire rifles broadly giving shooters a dependable mounting option whether they are setting up a plinking rifle or a dedicated small-game gun. For rimfire shooters seeking a trustworthy one-piece base from an established optics manufacturer the Open Range delivers exactly that. Leupold Open Range Specifications Manufacturer: Leupold Model: Open Range Color: Black Material: Aluminum Firearm Type: Rimfire Rifle Mount Type: Dovetail Finish: Matte Pieces: 1 Available At: GrabAGun