Rusan Reducing Ring for Rusan 2.5x and 3x Eyepiece (M35x0.75)

• Made for Rusan 2.5x and 3x eyepieces: This reducing ring is built around the M35x0.75 eyepiece interface, giving a correct mechanical fit for compatible Rusan oculars and helping maintain a secure connection in a clip-on setup.
• Part of a modular adapter system: It lets a modular clip-on arrangement be configured around the eyepiece in use, which makes it easier to adapt one night-vision or thermal setup across different riflescope combinations.
• Compact metal accessory: As a small dedicated adapter component, it adds the needed interface without unnecessary bulk, helping keep the overall clip-on assembly practical in the field.
• Black finish: The subdued finish matches typical hunting optics and tactical optics setups while keeping the accessory visually discreet on the rifle.
• Croatian-made Rusan component: Produced by Rusan in Croatia, it follows the same product approach as the company’s clip-on adapters and mounting parts, where fit and repeatable alignment matter in everyday use.

About the Rusan Accessories Series

Rusan Accessories is the support range behind the company’s clip-on mounting ecosystem, covering adapters, reduction rings and related parts for attaching night-vision and thermal clip-on devices to riflescopes. The series is built around a practical idea: one clip-on device often needs to work across more than one rifle, and different riflescopes may require different interface parts to achieve a correct fit. That is why the range includes both dedicated adapter components and modular-system accessories rather than a one-size-fits-all solution.

Within the wider Rusan lineup, this series sits alongside the company’s mounts, rings and rails, but it is focused specifically on the connection point between the optic and the clip-on device. Rusan’s adapter concept entered the global market in 2009, and the company later expanded the idea with a modular adapter system whose first prototype was completed in 2020. In practice, that gives users a more flexible way to configure clip-on equipment, swap compatible parts and tailor the setup to a particular eyepiece or riflescope diameter without replacing the entire mounting solution.

About the Rusan Reducing Ring for Rusan 2.5x and 3x Eyepiece (M35x0.75)

The Rusan Reducing Ring for Rusan 2.5x and 3x Eyepiece (M35x0.75) is a dedicated adapter component for users building or refining a clip-on system around Rusan 2.5x and 3x eyepieces. Its role is straightforward but important: it provides the correct interface for the eyepiece thread, allowing the surrounding adapter system to be matched properly to the optic setup. In clip-on use, that matters because the quality of the connection affects how securely the device sits and how easily the system can be configured for repeatable use.

As part of the Rusan modular adapter ecosystem, this ring is aimed at shooters who want a more adaptable night-vision or thermal-imaging arrangement rather than a fixed single-rifle solution. A reducing ring like this helps bridge the gap between a specific ocular thread and the rest of the adapter assembly, which is especially useful when one clip-on device is shared between rifles or when different optics require different interface parts. The result is a cleaner, more purpose-built fit than improvised spacing solutions.

The design is also consistent with what this category of accessory should be: compact, simple and dedicated to compatibility. The black finish keeps it visually unobtrusive, while the product’s focused design makes it a practical spare or setup component for hunters and other users who rely on clip-on equipment in low-light conditions.

About Rusan

Rusan-Mikron is a Croatian manufacturer based in Marija Bistrica, with roots in the Rusan family’s metalworking business dating to 1983. Željko Rusan opened a gunsmith shop in 1986, and the company began producing scope mounts in 1993. That background helps explain why Rusan is closely associated with precision-made mounting hardware and adapter components for sporting and shooting optics.

Today, the company manufactures scope mounts, scope rings, Picatinny rails and firearm tuning products, and it is especially well known for adapter clamps used with night-vision and thermal-imaging devices. Rusan introduced its clip-on sight adapter clamp in 2009, establishing a product family that remains central to the brand. In this category, Rusan’s reputation is built on practical mechanical design: secure attachment, model-specific fit and modular solutions for combining riflescopes with clip-on devices.

Main Features

• Manufacturer: Rusan
• Series: Rusan Accessories
• Product type: Reducing ring for clip-on adapter monoculars
• Compatible eyepiece: Rusan 2.5x and 3x eyepiece
• Thread: M35x0.75
• Country of origin: Croatia
• Color: Black

Warranty

2 years. This Rusan accessory is covered by a 2-year warranty.