Rusan Extension Ring for Dedal 552 with Counter Nut

• Dedal 552 fitment: This extension ring is made for the Dedal mounting standard (M52x0.75), giving the extra clearance needed when a clip-on device uses a larger front section that would otherwise interfere with a small adapter clamp.
• Counter nut included: The supplied counter nut helps secure the ring in position, which supports consistent alignment and a more stable connection between the clip-on device and the adapter setup.
• Built for thermal clip-ons: Designed as an accessory for thermal clip-on systems, it solves a specific mounting problem without changing the basic handling of the host optic.
• Practical adapter accessory: As part of the Rusan Accessories range, it extends the usefulness of compatible adapter clamps and helps users configure existing mounting hardware for demanding clip-on combinations.
• Made in Croatia: Manufactured by Rusan in Croatia, this ring follows the company’s established focus on precisely machined mounting parts for hunting optics and night-vision or thermal attachments.

About the Rusan Accessories Series

Rusan Accessories is the support range behind the company’s clip-on mounting systems, covering the small but important parts that make night-vision and thermal setups work correctly in the field. The series includes adapters, reduction rings, spare parts and system-specific accessories for attaching front-mounted devices to riflescopes with the correct spacing and thread interface. It sits alongside Rusan’s broader program of scope mounts, rings and rails, but its role is more specialized: solving compatibility issues between different optics and clip-on standards.

A key characteristic of the series is its focus on practical modularity. Rusan offers both conventional and modular adapter systems, and the accessory line supports that approach by letting users adapt one clip-on device to different rifles or configure different devices around different scopes. The family is especially relevant for hunters and shooters using thermal or night-vision front attachments, where correct alignment, repeatable positioning and proper lens clearance matter as much as the main adapter itself. In that context, the accessories are not add-ons in the casual sense; they are functional mounting components that help the complete system work as intended.

About the Rusan Extension Ring for Dedal 552 with Counter Nut

The Rusan Extension Ring for Dedal 552 with Counter Nut is a purpose-built mounting accessory for users running a thermal clip-on with the Dedal M52x0.75 mounting standard. Its job is straightforward but important: it provides the extra stand-off needed when the clip-on device has a larger front section that projects beyond the thread area. In practical use, that added spacing helps prevent interference between the device and smaller adapter clamps, allowing the clip-on system to be mounted correctly without forcing an unsuitable fit.

This makes the ring especially relevant for setups where compact adapter dimensions would otherwise limit compatibility. Rather than replacing the entire mounting solution, the extension ring lets the user keep the existing adapter concept and adapt it to the physical shape of the device. The included counter nut adds another functional benefit by helping secure the ring in place, supporting a more controlled and repeatable assembly. That matters on clip-on systems, where correct orientation and stable positioning affect both ease of use and confidence in the setup.

As a Rusan component, the ring is aimed at shooters and hunters who want a clean mechanical solution instead of improvised spacing parts. It is a simple product, but in a clip-on mounting system simplicity is often the point: correct thread compatibility, reliable spacing and a secure mechanical interface are what allow the rest of the optical system to perform properly.

About Rusan

Rusan-Mikron is a Croatian manufacturer based in Marija Bistrica, with the Rusan family’s metalworking business dating back to 1983. The company entered scope-mount production in 1993 and has since built its reputation around precisely machined mounting components for sporting and hunting firearms. Its product range includes scope mounts, scope rings, Picatinny rails and firearm tuning products, alongside a well-established line of adapters for night-vision and thermal devices.

Rusan is particularly well known for its clip-on adapter systems. The company introduced its adapter clamp for clip-on sights in 2009, expanding from traditional mounting hardware into solutions for modern thermal and night-vision use. That background is directly relevant here: products such as extension rings, counter nuts and adapter parts reflect Rusan’s emphasis on mechanical fit, repeatability and compatibility across different optical platforms.

Main Features

• Manufacturer: Rusan
• Series: Rusan Accessories
• Made in: Croatia
• Accessory for: Thermal Clip-on
• Front compatibility: Dedal Mounting Standard (M52x0.75)

Warranty

2 years. This Rusan accessory is covered by a 2-year warranty, making it suitable for regular field use as part of a thermal clip-on mounting setup.