Rusan Pair of Rings, 40 mm

• 40 mm ring diameter: Built to match 40 mm optics, this ring pair provides correct support around the tube so the sight sits securely without uneven clamping.
• Steel construction: The steel body gives these upper ring parts the rigidity needed for a stable hold, helping the mount stay consistent under repeated recoil and regular handling.
• Rusan Ø 8 mm interface compatibility: Designed for Rusan bases with an Ø 8 mm interface, these rings fit into the brand’s mounting system cleanly and simplify replacement or reconfiguration.
• KR 0.0 mm extension: The non-extended layout keeps the ring geometry straightforward, which is useful when the optic already sits in the correct position and no offset is required.
• Upper-part replacement format: As a dedicated upper mount component, this pair is practical for repairs, diameter changes, or completing an existing Rusan mount without replacing the whole assembly.

About the Rusan Spare Parts Series

Rusan Spare Parts covers the manufacturer’s replacement and modular mount components for users who want to maintain, adapt, or complete an existing Rusan setup rather than replace it outright. Within this family, the company lists ring components under its scope-mount parts range, including items identified as upper parts for ring assemblies. That makes the series especially relevant to shooters and gunsmiths working with established Rusan bases and interfaces.

The series reflects Rusan’s modular approach to mounting hardware. Different ring diameters are offered, including 26, 30, 34, 35, 36, and 40 mm, and selected ring-part listings are available in multiple heights and attachment patterns. In practical terms, this gives users a way to match ring size to the optic body while keeping compatibility with the underlying mount system. Rather than treating the mount as a sealed one-piece solution, the Spare Parts range supports serviceability, fit adjustment, and system continuity. For shooters using specialist optics, hunting optics, or workshop-built rifle setups, that parts-based design is often the more efficient way to keep a proven mounting arrangement in use.

About the Rusan Pair of Rings, 40 mm

The Rusan Pair of Rings, 40 mm is a dedicated upper ring set for mounting optics with a 40 mm body diameter on a compatible Rusan base with an Ø 8 mm interface. Its role is straightforward but important: it provides the correctly sized clamping surface for larger-diameter optics while preserving compatibility with the rest of the Rusan mounting system. That makes it a sensible choice when replacing worn ring tops, changing to a different optic tube size, or completing a mount from existing Rusan components.

The use of steel construction is especially relevant in this category. For mount rings, material stiffness matters because it helps maintain even clamping pressure and resists movement from recoil, transport, and repeated removal or installation. The black finish keeps the appearance discreet and matches common riflescope and mount hardware. With KR 0.0 mm extension, this version stays in a neutral, non-offset format, which suits setups where eye relief and optic position are already established by the base and lower mount geometry.

As part of a modular mount system, this ring pair is less about adding features and more about preserving correct fit. The benefit is practical: instead of replacing a complete mount, the user can retain the existing Rusan platform and install the ring size needed for a 40 mm optic. That approach is useful for maintenance, workshop assembly, and adapting a rifle setup to a different sight body while keeping the same mounting standard.

About Rusan

Rusan-Mikron is a Croatian manufacturer based in Marija Bistrica, Croatia, with roots in the Rusan family’s metalworking business dating back to 1983. The company’s firearms-related development expanded through a gunsmith shop opened by Željko Rusan in 1986, and Rusan began producing scope mounts in 1993. That background helps explain the brand’s strong focus on practical mechanical solutions and compatibility across different rifle platforms.

Today, Rusan is known for manufacturing scope mounts, scope rings, Picatinny rails, and firearm tuning products, along with adapter systems for night-vision and thermal devices. The company introduced its clip-on sight adapter clamp in 2009, a product type that became closely associated with the brand. Across its range, Rusan’s reputation is built on metalworking experience, modular mounting design, and a product catalogue that serves both conventional daytime optics and modern electro-optics.

Main Features

• Manufacturer: Rusan
• Series: Rusan Spare Parts
• Made in: Croatia
• Material: Steel
• Extension (KR): KR 0.0 mm
• Scope / Sight Type: 40 mm
• Bubble Level: No
• Color: Black
• Compatibility Above: 40 mm
• Compatibility Below: Rusan Ø 8 mm Interface

Warranty

10 years. This product is covered by a ten-year warranty period.