Leupold STD Two-Piece base, Browning BLR

• Two-piece STD base design: The split base layout leaves more access to the rifle’s loading and ejection area while giving flexible ring placement for scopes of different lengths.
• Windage-adjustable STD interface: The Leupold Standard system uses a front dovetail and rear windage screws, which helps align the scope during mounting and preserves more internal adjustment for zeroing.
• Steel construction: A steel base gives the mounting system the rigidity needed to keep an optic stable under recoil and hard field use.
• Made for Browning BLR-pattern rifles: This base is built for the listed BLR-family and related compatible rifles, giving a correct fit for a secure installation.
• Low-profile 4.00 mm height: The compact base height helps keep the scope close to the bore, supporting a more natural cheek weld and a cleaner rifle setup.

About the STD Series

Leupold STD bases and rings sit at the traditional end of the company’s mounting lineup, aimed at hunters and shooters who want a proven steel mounting system rather than a tactical rail. The series is built around the long-established Standard (STD) interface, which combines a front dovetail ring seat with rear windage adjustment. That layout gives the system a practical advantage on sporting rifles: it helps the installer center the scope more precisely while keeping more of the optic’s internal elevation travel available for zeroing or ballistic dial use.

Within Leupold’s mount range, the STD series is known for its straightforward mechanical design, broad rifle compatibility, and traditional appearance that suits classic hunting rifles. It is commonly chosen for bolt-actions, lever-actions, and semi-automatic sporting rifles where a compact, durable base matters more than adding extra rail length. Steel construction, low-profile geometry, and compatibility with different ring heights make the series a sensible fit for general hunting optics, from compact scopes to standard 3-9x and 4-12x class riflescopes.

About the Leupold STD Two-Piece base, Browning BLR

The Leupold STD Two-Piece base, Browning BLR is a rifle-specific steel base set for shooters who want a traditional scope mounting solution on a Browning BLR-pattern rifle. Its two-piece layout is especially useful on sporting rifles because it keeps the receiver area more open than a full-length one-piece base. In practice, that means easier access around the action and more freedom to position the scope so eye relief works correctly with different optic lengths.

This model uses the Leupold Standard (STD) mounting pattern, which is valued for its windage-adjustable rear arrangement. That feature is more than a mechanical detail: it helps bring the scope into alignment during installation, reducing the need to use up the riflescope’s internal windage correction just to compensate for the mount. For hunters using ballistic dials or simply wanting a cleaner zero, that can be a real advantage.

The base is made from steel, which suits rifles that see regular field carry, recoil, and repeated use over time. Its 4.00 mm base height keeps the setup low and tidy, helping maintain a natural head position behind the scope. For BLR owners who want a compact, durable mounting platform compatible with Leupold Standard (STD) rings, this base keeps the installation simple and mechanically sound.

About Leupold

Leupold & Volpel was founded in Portland, Oregon, in 1907 by Fred Leupold and Adam Volpel. The company grew into a specialist in sport optics for hunting, shooting, and outdoor use, with product lines that include riflescopes, red dot sights, binoculars, spotting scopes, rangefinders, and thermal optics. That broad optics background is important in the mounting category as well, because Leupold designs bases and rings to work as part of a complete sighting system rather than as stand-alone accessories.

Leupold introduced its first riflescope, the Plainsman, in 1947, and later introduced the Duplex reticle in 1962, a design that became widely recognized in sporting optics. The company moved its manufacturing plant and headquarters to Beaverton in 1968, where Leupold & Stevens, Inc. remains headquartered today. Its lineup spans hunting-focused VX-series optics and Mark-series tactical riflescopes, reflecting long experience in both sporting and precision shooting applications.

Main Features

• Manufacturer: Leupold
• Product type: Mount base
• Series compatibility: Leupold Standard (STD)
• Base configuration: Two-piece
• Compatible rifle: Browning BLR
• Material: Steel
• Base height: 4.00 mm
• Made in: USA
• Compatibility: FN Browning BPR, FN Browning Acera, Benelli ARGO, Benelli R1, Fabarm Iris, FN Browning BAR, FN Browning BAR MK2, FN Browning BAR MK3, FN Browning Maral, FN Browning BLR SA, FN Browning BLR LA, FN Browning BLR Lightning SA, FN Browning BLR Lightning LA, Mossberg 695, SIG Sauer SHR 970, Winchester SXR Vulcan

Warranty

10 years. Leupold lists this mount base with a ten-year warranty period, giving defined long-term coverage for the product.