Rusan Upper Parts (without base) for Scope Mount Swiss K31, 26 mm

• Swiss K31-specific fit: Made as the upper section for the Rusan scope mount for the Swiss K31, these parts are intended to match that rifle platform correctly and simplify replacement when the original upper assembly is worn or damaged.
• 26 mm ring diameter: The 26 mm size supports compatible scope tubes securely, helping maintain proper alignment without forcing an incorrect fit that could mark the optic or compromise mounting stability.
• Upper parts only: Supplied without the base, this version is useful when the lower mount remains serviceable and only the ring-top assembly needs to be replaced, avoiding unnecessary duplication of parts.
• Steel mount-system compatibility: As part of Rusan’s rifle mounting program, these upper parts are designed for practical integration into a dedicated scope-mount setup where repeatable clamping and solid optic support matter.
• Black finish: The black surface keeps the appearance consistent with most rifles and optics while also being practical for field use, where a subdued finish is preferred over reflective bare metal.

About the - Series

Rusan’s mount components are built around a practical design approach: make rifle-specific mounting parts that solve fitment problems cleanly and hold optics securely in real use. Within the company’s lineup, these products sit in the core of its firearms-accessory offering, alongside scope mounts, scope rings and Picatinny rails. The emphasis is on mechanical compatibility, straightforward installation and durable metal construction rather than unnecessary complexity.

That philosophy suits shooters who need dependable hardware for sporting rifles, military surplus platforms and specialist setups where a generic mount is not the right answer. In the same broader product family, Rusan is also known for adapter clamps for clip-on sights and interfaces for night-vision and thermal-imaging devices, which shows the company’s focus on precise attachment systems. For conventional optical sights, the benefit is simple: components such as these upper parts are made to integrate into a dedicated mount architecture, so the optic can be supported with the correct tube diameter and the correct rifle-specific geometry.

About the Rusan Upper Parts (without base) for Scope Mount Swiss K31, 26 mm

The Rusan Upper Parts (without base) for Scope Mount Swiss K31, 26 mm are a dedicated replacement or service component for shooters using a Swiss K31 scope-mount setup. Instead of replacing a complete mount, this version provides only the upper section, which is the practical choice when the lower base is already installed and remains in good condition. That makes it especially useful for maintenance, refurbishment or adapting an existing mount back into service with the correct ring size.

The defining feature is the 26 mm ring diameter. That dimension matters because older and specialist optics are not always built around today’s more common 25.4 mm or 30 mm tube standards. Using the correct diameter helps the scope sit evenly in the rings, reduces the risk of uneven clamping pressure and supports more consistent alignment. In practice, that means a cleaner installation and less chance of stressing the optic tube during mounting.

Its black finish keeps the assembly visually discreet and in line with typical riflescope hardware. As a mount spare part rather than a universal ring set, this product is best understood as a precise mechanical element within a larger Rusan mounting system. For owners of a Swiss K31 setup who need the correct upper assembly rather than a full replacement mount, it offers a direct, purpose-built solution.

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 when Željko Rusan opened a gunsmith shop in 1986, and Rusan began producing scope mounts in 1993. That background explains the company’s strong focus on machining and fit-critical mounting components.

Today, Rusan is known for manufacturing scope mounts, scope rings, Picatinny rails and firearm tuning products, along with adapter systems for modern electro-optics. A notable step in its development came in 2009, when it introduced its clip-on sight adapter clamp. Across its product range, the company concentrates on practical attachment solutions for optical, night-vision and thermal equipment, which makes it a natural specialist in rifle-mounting hardware and related accessories.

Main Features

• Manufacturer: Rusan
• Made in: Croatia
• Product type: Upper parts for scope mount base
• Compatibility: Swiss K31 scope mount
• Tube diameter: 25.4
• Color: Black

Warranty

2 years. Rusan states a 2-year warranty for this product, providing defined coverage for a mount component intended for long-term use as part of a rifle optics setup.