Leupold STD Two-Piece base, Cooper 22/16/23

• Two-piece STD base design: The split-base layout leaves the loading and ejection port more open, which helps preserve access to the action while still providing a solid mounting platform for a hunting riflescope.
• Steel construction: A steel base resists wear, recoil stress, and repeated scope changes better than lighter materials, making it a dependable choice for a rifle that sees regular field use.
• STD mounting interface: Leupold's Standard system uses a front dovetail and rear windage-adjustable arrangement, giving extra alignment flexibility during installation and helping keep more scope adjustment in reserve.
• Cooper-specific fit: This base is made for Cooper Model 16, 22, and 23 rifles, so it provides the correct footprint for a clean, secure installation without improvised fitting.
• Low-profile matte finish: The matte surface keeps reflections down and gives the mount a subdued appearance that matches practical hunting optics and field rifles well.

About the Standard Series

Leupold Standard (STD) mounts are the company's traditional steel mounting system for sporting rifles. Positioned as a versatile option in the Leupold lineup, the STD series is built for hunters and shooters who want a proven interface that balances strength, straightforward installation, and broad rifle compatibility. The system is centered on a front dovetail ring connection with a rear base that allows windage adjustment, a layout that has remained popular because it combines secure ring engagement with useful alignment control during setup.

Within the Leupold mount range, STD bases and rings suit conventional hunting rifles especially well. They are offered in one-piece and two-piece configurations and pair with STD rings in multiple heights, allowing the setup to be tailored to different scope sizes and rifle actions. The design philosophy is practical rather than bulky: strong steel parts, close tolerances, and a mounting geometry that helps the optic stay in place under recoil. For shooters using standard sporting calibers and classic bolt-action rifles, the Leupold STD series remains a dependable choice that emphasizes fit, durability, and clean rifle handling.

About the Leupold STD Two-Piece base, Cooper 22/16/23

The Leupold STD Two-Piece base, Cooper 22/16/23 is a rifle-specific mounting solution for shooters using Cooper Model 16, 22, and 23 actions with Leupold's Standard ring system. Its two-piece format keeps the receiver area more open than a full-length base, which is useful on a sporting rifle where easy access to the action matters as much as secure scope support. That makes it a sensible fit for hunting rifles and general-purpose field setups where a compact, uncluttered mounting arrangement is preferred.

This model is built from steel, which gives the base the rigidity needed to hold alignment under recoil and during repeated transport or handling. The STD interface is especially useful in practice because the front dovetail ring locks firmly into place while the rear windage screws allow lateral adjustment during bore sighting. That extra adjustment can help center the scope more efficiently and reduce the need to use up internal windage travel. Leupold also notes that shims can be used when needed, helping preserve the scope's elevation adjustment for ballistic dialing applications.

With its matte finish and low-profile form, this base suits traditional hunting optics without adding unnecessary bulk. For a Cooper rifle chambered in standard calibers, it provides a straightforward way to build a durable scope mounting setup around the established Leupold Standard system.

About Leupold

Leupold & Volpel was founded in Portland, Oregon, in 1907 by Fred Leupold and Adam Volpel. The company remains family-owned and focuses on sport optics for hunting, shooting, and outdoor use. Over time, Leupold expanded its range to include riflescopes, red dot sights, binoculars, spotting scopes, rangefinders, and thermal optics, giving it a broad presence across the shooting and observation categories.

A key part of the brand's history in riflescopes began with the Plainsman in 1947, followed by the introduction of the Duplex reticle in 1962, a design that became widely recognized among hunters. The company later moved its manufacturing plant and headquarters to Beaverton in 1968. Today, Leupold is still headquartered in Beaverton, Oregon, United States, and its product range spans traditional hunting optics as well as tactical-focused lines such as the VX-series and Mark-series.

Main Features

• Manufacturer: Leupold
• Product type: STD two-piece base
• Compatibility: Cooper Model 16, Cooper Model 22, Cooper Model 23
• Mounting system: Leupold Standard (STD)
• Material: Steel
• Color: Matte
• BH height: 4.00 mm
• Weight: 1.7 oz
• Base configuration: 2 Piece
• Base cant: No
• Base/Receiver Screw Torque: 22 in-lbs
• Windage Screw Torque: 45 in-lbs
• Made in: USA

Warranty

Leupold provides a 10-year warranty for this mount base. This stated period supports long-term use on a working rifle and reflects the durable steel construction of the Standard mounting system.