Rusan reducing ring for Seer/NightSeer (M43x0.75)

• M52x0.75 to M43x0.75 thread conversion: lets compatible thermal clip-on devices with an M43x0.75 interface be paired with a larger-thread adapter setup, making it easier to integrate the device into an existing riflescope mounting system.
• Built for thermal clip-on use: this ring is made specifically for clip-on attachments, so it serves a clear practical role in building a stable front-mount solution rather than acting as a generic workshop spacer.
• Steel construction: the steel body resists thread wear and deformation better than softer materials, which matters when the ring is fitted, removed, and reinstalled as part of a working field setup.
• Counter nut and wrench included: the supplied hardware helps with positioning and installation, reducing the need to source extra tools before assembling the adapter combination.
• Compact, low-mass design: at 50.00 g, the ring adds only modest weight to the front of the optic, helping preserve the handling balance of a clip-on-equipped rifle.

About the Rusan Accessories Series

Rusan Accessories is the supporting hardware range behind the company’s night-vision and thermal clip-on mounting systems. The series covers adapters, reduction rings, spare parts, and mounting components that let users match different device threads and riflescope diameters without replacing an entire setup. A key idea behind the range is flexibility: one clip-on can be adapted to different rifles, and different clip-on devices can be integrated into a broader mounting system with fewer dedicated parts.

Within the Rusan lineup, this family sits alongside the company’s scope mounts, rings, and rails, but it is focused specifically on the interface between optics and clip-on devices. The range includes both conventional and modular adapter systems, giving users a choice between straightforward dedicated solutions and more configurable setups. For practical field use, that means easier equipment sharing, simpler replacement of worn or damaged interface parts, and a more economical way to keep thermal and night-vision equipment compatible across multiple riflescope combinations.

About the Rusan reducing ring for Seer/NightSeer (M43x0.75)

The Rusan reducing ring for Seer/NightSeer (M43x0.75) is a dedicated interface part for building a clip-on mounting solution around devices such as the Cono Seer and NightPearl NightSeer. Its role is straightforward but important: it converts an outer M52x0.75 thread to an inner M43x0.75 thread, allowing a device with the smaller thread standard to be integrated into a compatible Rusan adapter arrangement.

That makes this ring especially useful for users who already have a day-scope adapter setup based on a larger thread standard and need to bridge the difference without changing the whole system. In practice, it is a compact mechanical link that helps maintain a clean, purpose-built installation for a thermal clip-on. The steel construction supports secure thread engagement and long-term durability, which is important on parts that are repeatedly assembled and disassembled during setup changes.

The included counter nut and wrench add practical value by simplifying installation and alignment. This is not a complete clip-on adapter by itself, but a reduction component intended to be combined with the appropriate Rusan Q-R adapter for the riflescope in use. For hunters and other users running front-mounted thermal equipment, that modular approach makes it easier to adapt proven optics to specific clip-on thread standards while keeping the overall mounting system consistent.

About Rusan

Rusan-Mikron is a Croatian manufacturer based in Marija Bistrica, Croatia, with roots in the Rusan family’s metalworking business going back to 1983. Željko Rusan opened a gunsmith shop in 1986, and the company began producing scope mounts in 1993. That background explains why Rusan products are strongly focused on precise mechanical fit, repeatability, and compatibility with sporting and hunting firearms.

Today, the company produces scope mounts, scope rings, Picatinny rails, firearm tuning parts, and adapters for night-vision and thermal-imaging devices. Rusan is particularly well known for its clip-on adapter systems, including the original adapter it brought to the global market in 2009. This experience in mounting solutions is directly relevant to products such as reduction rings and clip-on interfaces, where thread accuracy, material strength, and dependable alignment matter more than cosmetic design.

Main Features

• Manufacturer: Rusan
• Series: Rusan Accessories
• Made in: Croatia
• Accessory type: Reducing ring for thermal clip-on devices
• Thread conversion: M52x0.75 (outside) to M43x0.75 (inside)
• Compatible devices: Cono Seer, NightPearl NightSeer, and other devices with M43x0.75 thread
• Material: Steel
• Color: Black
• Weight: 50.00 g

Warranty

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

In the Box

• Reducing ring
• Counter nut
• Wrench