Osuma Single Ring for Osuma Base, 25.4 mm

• Single replacement ring: This ring is made for the Osuma Base system, making it a practical choice when replacing a damaged upper part or completing a fixed mount without changing the entire setup.
• 25.4 mm (1 inch) fit: The ring is sized for 1 inch scope tubes, giving secure support for many traditional hunting optics while preserving correct tube alignment.
• Aluminium construction: The aluminium body keeps weight down while still providing the rigidity needed for a stable riflescope mounting interface in field use.
• Anodized black finish: The black anodized surface helps resist wear and handling marks, while also matching common scope and base finishes for a clean installation.
• Broad base compatibility: The ring works with Ø 7 mm interface bases from Osuma, EAW, Optilock and Recknagel, which makes it useful for maintaining or adapting existing mounting systems.

About the Osuma Osuma Base Rings Series

Osuma Osuma Base Rings are part of the brand’s fixed scope-mount system, built to attach directly to Osuma bases and form a modular mounting solution for hunting and shooting rifles. The series is designed around a simple three-part concept consisting of a base, bottom ring and top ring, which makes it easier to configure a mount to the rifle, rail type and scope tube diameter required.

Within the range, Osuma offers versions for 1 inch, 30 mm, 34 mm, 36 mm and 40 mm scope tubes, along with low, medium and high height options where available. The rings are made from high-grade aluminium with an anodized surface, reflecting the series focus on low weight, dimensional precision and everyday durability. In practical use, this makes the Osuma Base Rings series well suited to traditional hunting rifles and general-purpose shooting setups where a fixed mount is preferred for its straightforward design, repeatable fit and clean profile.

About the Osuma Single Ring for Osuma Base, 25.4 mm

The Osuma Single Ring for Osuma Base, 25.4 mm is a spare or replacement upper component for shooters using the Osuma Base mounting platform with a 1 inch riflescope tube. Instead of replacing a complete mount assembly, this single ring lets the user restore or complete an existing setup while keeping the same base interface already fitted to the rifle. That makes it especially useful for maintenance, repairs or custom assembly of a fixed scope mount.

The ring is built from aluminium, which keeps the part light while still providing the clamping strength needed to hold a scope tube securely in place. For practical field use, lower weight in the mounting system helps avoid adding unnecessary bulk to a hunting rifle, while a rigid ring remains important for maintaining scope position under recoil and regular handling. The black finish gives the part a discreet appearance and helps it blend with most riflescopes and bases.

This version is intended for 25.4 mm - 1" scope tubes and uses the Ø 7 mm interface found on Osuma, EAW, Optilock and Recknagel-compatible bases. With KR 0.0 mm extension, it is a straightforward non-extended ring for standard mounting positions where the scope can be placed correctly without offset. In use, that makes it a sensible choice for conventional hunting optics and fixed mounting arrangements that prioritize simplicity, compactness and a secure fit.

About Osuma

Osuma is a Finland-based brand whose history goes back to the early 1990s, when its owner developed the first scope mounts for his own hunting and benchrest shooting needs. The company later passed from father to son, and rifle scope mounting remains its main area of expertise. Osuma designs and manufactures its products in Finland, with a product range centered on scope mounts, scope rings, rail mounts and mounts for red-dot and holographic sights, alongside selected shooting accessories.

Within this category, Osuma is particularly known for practical mounting solutions across several rifle interfaces, including 11 mm, Tikka 17 mm, Sako, Picatinny and Optilock systems. Its scope rings are made from aluminum with an anodized surface, reflecting the brand’s emphasis on low weight, durability and precise fit for hunting and shooting use.

Main Features

• Manufacturer: Osuma
• Series: Osuma Osuma Base Rings
• Made in: Finland
• Material: Aluminium
• Extension (KR): KR 0.0 mm
• Scope / sight fit: 25.4 mm - 1"
• Color: Black
• Compatibility above: 25.4 mm (1 inch)
• Compatibility below: EAW Ø 7 mm Interface, Optilock Ø 7 mm Interface, Osuma Ø 7 mm Interface, Recknagel Ø 7 mm Interface

Warranty

Osuma provides a 2-year warranty for this product category. This stated period covers manufacturing quality and matches the warranty term given for Osuma products.