Leupold STD One-Piece base, Winchester 70A

• One-piece steel construction: The solid steel body gives the base the rigidity needed for a stable scope-to-rifle connection, helping the optic stay aligned under repeated recoil and field use.
• STD mounting interface: Built for the Leupold Standard (STD) system, it works with the front dovetail and rear windage-adjustable arrangement that makes scope alignment easier during installation.
• Windage-adjustable rear setup: The STD design lets the rear ring position be tuned with windage screws while bore sighting, which can reduce the amount of internal scope adjustment used for zeroing.
• Winchester 70A fit: This base is made specifically for the Winchester 70A, giving a correct receiver fit instead of relying on a generic rail pattern.
• Made in USA steel base: American-made steel construction and a low 4.00 mm base height suit traditional hunting rifle builds where durability and a close-to-bore scope position matter.

About the STD Series

Leupold STD bases and rings are the company’s traditional steel mounting system for sporting rifles. In Leupold’s lineup, the Standard (STD) family sits as a proven option for hunters and shooters who want a strong mechanical interface without moving to a Picatinny-style rail. The system is widely used on classic bolt-action rifles and remains popular for conventional hunting optics where a clean profile, dependable fit, and straightforward installation matter more than modular accessory space.

A defining feature of the series is its front dovetail ring connection combined with a rear windage-adjustable ring position. In practice, that layout helps the installer center the scope more effectively during bore sighting and can preserve more of the scope’s internal elevation adjustment for zeroing or ballistic dial use. The STD family is also known for its steel construction, broad firearm compatibility, and compatibility with multiple ring heights, making it adaptable to different objective sizes and rifle setups. For traditional hunting rifles, the STD series offers a practical balance of strength, low-profile mounting, and familiar handling.

About the Leupold STD One-Piece base, Winchester 70A

The Leupold STD One-Piece base, Winchester 70A is built for shooters who want a traditional steel mounting solution matched to the receiver geometry of the Winchester 70A. Its one-piece configuration adds rigidity across the action, which is useful when the goal is a stable optic platform for repeatable zero retention on a hunting rifle. Because it is part of the Leupold Standard (STD) system, it is intended to work with STD rings rather than as a universal rail.

The practical advantage of this model lies in the STD layout itself. The front dovetail ring locks in securely, while the rear ring position can be adjusted laterally with windage screws during setup. That makes it easier to align the scope with the rifle and can reduce the amount of correction needed inside the optic. For shooters using ballistic dials or trying to keep as much elevation travel available as possible, that is a meaningful benefit.

Its steel construction favors durability over minimum weight, which suits hard field use and rifles that may spend seasons in and out of cases, vehicles, and blinds. The relatively low 4.00 mm base height also supports a close-to-bore mounting position, helping maintain a trim rifle profile and a natural cheek weld when paired with the appropriate STD rings.

About Leupold

Leupold & Volpel was founded in Portland, Oregon, in 1907 by Fred Leupold and Adam Volpel. The company later expanded into sporting optics and introduced its first riflescope, the Plainsman, in 1947. That long involvement in hunting and shooting optics is a major reason Leupold remains closely associated with practical field equipment rather than purely target-oriented products.

Today, Leupold & Stevens, Inc. is headquartered in Beaverton, Oregon, United States, and remains family-owned. Its product range covers riflescopes, red dot sights, binoculars, spotting scopes, rangefinders, and thermal optics for hunting, shooting, and outdoor use. Within that lineup, Leupold is especially well known for riflescopes and mounting systems designed around durability, straightforward operation, and compatibility with traditional sporting rifles.

Main Features

• Manufacturer: Leupold
• Product type: One-piece base
• Compatibility: Leupold Standard (STD)
• Fits: Winchester 70A
• Material: Steel
• Base height: 4.00 mm
• Made in: USA

Warranty

10 years. This mounting base is covered by a 10-year warranty, making it a suitable choice for a rifle setup intended for long-term field use.