Rusan Single Ring, 25.4 mm

• Single 25.4 mm ring part: This upper ring section is made for 25.4 mm (1 inch) scope tubes, making it a practical replacement when only one ring half needs to be changed instead of replacing a complete mounting set.
• Steel construction: The steel body provides the rigidity needed to keep the scope clamped securely, which helps maintain stable alignment under regular field and range use.
• Rusan Ø 8 mm interface compatibility: Built to fit the Rusan Ø 8 mm Interface, this ring part integrates with the matching mounting system and simplifies repairs or configuration changes within the same platform.
• Black finish: The black surface keeps the part visually consistent with most scope mounts and rifles while also being practical for hard use equipment.
• KR 0.0 mm extension: With no added extension, this ring keeps the optic in its intended mounting position, which is useful when replacing an original part without changing eye relief or ring spacing.

About the Rusan Spare Parts Series

Rusan Spare Parts covers the company’s replacement and mounting-component range for shooters who want to maintain, repair or adapt an existing Rusan setup without replacing the whole mount. Within this family, Rusan groups ring components under its scope-mount and ring parts program, including items listed as upper parts and sold as individual pieces. That makes the series especially useful for armourers, gunsmiths and owners who need a specific ring half, attachment style or diameter rather than a complete ring set.

The series spans multiple tube sizes, with ring-part listings that include 26, 30, 34, 35, 36 and 40 mm diameters, and selected versions are offered in different heights to match the intended mounting geometry. Rusan also identifies attachment variants such as 8/M5 and 8/M6, showing that the range is designed around compatibility within the brand’s modular mounting system. In practice, the Spare Parts series is less about adding features and more about preserving fit, alignment and serviceability across Rusan scope mounts.

About the Rusan Single Ring, 25.4 mm

The Rusan Single Ring, 25.4 mm is a replacement upper ring part intended for optics with a 25.4 mm (1 inch) main tube. Its role is straightforward but important: it restores the clamping section of a compatible mount when one ring half is damaged, missing or being matched to an existing Rusan base system. Because it is a single ring part rather than a complete pair, it suits repairs, workshop spares and custom mounting work where only one component is required.

The use of steel is significant in this category. A ring half must hold even pressure on the scope tube and remain dimensionally stable when tightened, and steel is well suited to that task in hard-use sporting and shooting applications. The KR 0.0 mm extension means this version does not shift the optic forward or rearward compared with the base mounting position, so it is appropriate when the goal is to keep the original eye-relief setup unchanged. Its compatibility with the Rusan Ø 8 mm Interface also matters in practice, as it allows the part to slot into an established Rusan mounting arrangement instead of forcing a full system replacement. Finished in black, it matches the subdued appearance expected of scope mounting hardware.

About Rusan

Rusan-Mikron is a Croatian manufacturer based in Marija Bistrica, with roots in the Rusan family’s metalworking business dating back to 1983. Željko Rusan opened a gunsmith shop in 1986, and the company began producing scope mounts in 1993, establishing the product area it is still known for today. Rusan’s catalogue covers scope mounts, scope rings, Picatinny rails and firearm tuning products, with a strong focus on practical mounting solutions for sporting and hunting rifles.

The company is also well known for its adapter systems for modern optical devices. It introduced its clip-on sight adapter clamp in 2009 and produces adapters for night-vision and thermal-imaging devices alongside conventional mounting hardware. That combination of machining experience and firearms-specific design is what makes Rusan a familiar name in the field of riflescope mounts and related accessories.

Main Features

• Manufacturer: Rusan
• Series: Rusan Spare Parts
• Product type: Single ring upper part
• Scope / sight tube diameter: 25.4 mm - 1"
• Compatibility above: 25.4 mm (1 inch)
• Compatibility below: Rusan Ø 8 mm Interface
• Material: Steel
• Extension (KR): KR 0.0 mm
• Bubble level: No
• Color: Black

Warranty

Rusan provides a 2-year warranty for this ring part.