EAW XS Rear Base for Pivot Mount Winchester 70 (C: 8.3mm)

• Repeatable pivot interface: This rear base is built for the EAW pivot system, so the optic can be removed and reattached without turning the rifle into a permanent one-scope setup. That is especially useful when alternating between different sighting systems on the same Winchester 70 platform.
• XS-pattern rear base geometry: The XS configuration is intended for rifles and optics that need a robust pivot-mount foundation, giving the rear of the mount a stable locking point that supports consistent alignment in field use.
• Steel construction: A steel rear base resists wear at the contact and locking surfaces better than lighter materials, which matters on detachable mounts that are repeatedly opened, closed and reinstalled over time.
• 0 MOA profile: With no built-in inclination, this base keeps the mounting setup straightforward for general hunting and sporting rifle use, where a neutral scope position is often the most practical starting point.
• Model-specific fit: Made for Winchester 70 variants and related actions listed in the compatibility range, this rear base supports a correct mechanical interface instead of relying on a generic one-size-fits-all solution.

About the EAW Magnum Pivot Mounts Series

EAW Magnum Pivot Mounts belong to the company’s long-established family of detachable hunting optics mounts and sit within a system that has been on the market since 1970. In the EAW range, the pivot design is aimed at shooters who want a mount that can be removed and reattached while keeping the rifle ready for repeatable use. That makes the series especially relevant for traditional hunting rifles, rifles that alternate between day optics and other aiming devices, and setups where transport or access to iron sights matters.

A defining characteristic of the series is the automatic locking rear foot, which allows one-handed attachment and removal, combined with adjustable front and rear feet for fitting and setup. The Magnum line is distinguished in EAW’s catalog from the Standard and XS versions and is intended for stronger recoil classes, with a 20 mm ring width specified for Magnum pivot mounts. Across the broader pivot-mount concept, EAW emphasizes repeatable return to zero, tension-free mounting, and the ability to configure mount height and eye relief around the rifle and optic rather than forcing a fixed compromise.

About the EAW XS Rear Base for Pivot Mount Winchester 70 (C: 8.3mm)

The EAW XS Rear Base for Pivot Mount Winchester 70 (C: 8.3mm) is the rear foundation piece of a detachable pivot-mount setup for Winchester 70-pattern rifles and related compatible actions. Its job is simple but critical: it provides the rear engagement point that lets an EAW pivot mount lock into place securely and return to the same position after removal. For a rifle that may carry different optics over time, that repeatability is the practical value of the design.

The XS rear-base format is intended to work with EAW Type Pivot Bases above, creating a dedicated interface rather than a universal compromise. Because this part is made from steel, it is well suited to the repeated opening, locking and bearing contact that detachable mounts experience in real use. The black finish keeps the appearance discreet and appropriate for classic sporting rifles.

The specified C dimension of 8.3mm is an important fitting detail within the EAW pivot system, as mount height and alignment in these systems depend on the correct base geometry for the rifle action. Combined with the 0 MOA inclination, this rear base is aimed at conventional riflescope mounting where the priority is a clean, mechanically correct installation for hunting or general sporting use. In practice, it is the kind of component chosen when the shooter wants the flexibility of a detachable mount without giving up a precise, model-specific fit.

About EAW

EAW was founded by Ernst Apel in Würzburg, Germany, in 1919. The company’s name comes from a later step in its history, when Ernst Apel acquired Elektro-Dental-Werke Frankfurt in 1923 and changed the EDW brand to EAW, meaning Ernst Apel Würzburg. EAW developed its first riflescope mounts in 1945, and since 1951 mount development and production have been the company’s primary focus.

Today, EAW is closely associated with German-made riflescope mounting systems, especially pivot, slide-on or roll-off, and claw mounts for sporting rifles. The company also offers thermal imaging cameras and expanded into tactical mounting solutions in 2023. Production moved from Würzburg to Gerbrunn in 1970, and Ernst Apel GmbH is now headquartered in Eibelstadt, Germany. In this product category, EAW’s reputation rests on precise, model-specific mount engineering for repeatable optic installation and removal.

Main Features

• Manufacturer: EAW
• Mount Series: EAW Magnum Pivot Mounts
• Made in: Germany
• Material: Steel
• Color: Black
• Inclination: 0 MOA
• C Dimension: 8.3mm
• Compatibility Below: Kimber 89 BGR (Round Top), Marlin XL-7, Marlin XS-7, Winchester M70 SA, Winchester M70 LA, Wichester M70 WSM, Winchester M70 WSSM, Winchester Extra long
• Compatibility Above: EAW Type Pivot Bases

Warranty

EAW provides a 2-year warranty for this rear base. That period suits a precision steel mounting component intended for long-term use as part of a detachable pivot-mount system.