Osuma base for 11mm, without rings

• 11 mm dovetail fit: This base is made for rifles with an 11 mm rail, giving a straightforward mounting platform for compatible Osuma rings and helping keep the scope aligned on common rimfire and hunting rifle dovetails.
• Separate-base design: Supplied without rings, it lets the shooter choose the ring diameter and height that suit the optic, which is useful when building a setup around a specific scope bell size or bolt clearance requirement.
• Steel construction: The steel body adds rigidity and wear resistance at the contact points, which matters on a mount base that may be installed, removed and reconfigured over time.
• 0 MOA inclination: The 0 MOA profile keeps the optic in a neutral position, making it a sensible choice for general hunting and everyday shooting distances where extra cant is not needed.
• Made in Finland: Designed and manufactured in Finland, this base reflects Osuma’s focus on practical rifle mounting hardware built for regular field use and repeatable installation.

About the Osuma Base Series

Osuma base mounts are the foundation pieces in the company’s modular scope-mounting system. Rather than combining every part into a single fixed unit, the series is built around a simple idea: match the correct base to the rifle’s rail, then add the appropriate rings for the optic. That approach makes the series especially practical for shooters who want to tailor ring height and tube diameter to a specific riflescope instead of accepting a one-size-fits-all mount.

Within Osuma’s lineup, these bases sit alongside the brand’s rings, ring mounts and rail mounts as the core hardware for traditional scope installation. The series is aimed at hunting optics and general sporting rifles where a secure mechanical interface matters more than unnecessary complexity. Different versions are offered for several mounting standards, including 11 mm, so the user can build around the rifle rather than adapt the rifle to the mount. The design philosophy is straightforward: durable materials, clean geometry and compatibility with the rest of the Osuma mounting system. For shooters who already know the ring height and tube size they need, a separate base is a flexible and sensible starting point.

About the Osuma base for 11mm, without rings

The Osuma base for 11mm, without rings is a dedicated mount base for rifles that use an 11 mm dovetail. Its main advantage is flexibility. Because the base is supplied without rings, it suits shooters who already own compatible Osuma rings or who want to choose ring height and tube diameter separately. That is useful when fitting different riflescopes, especially if the setup needs extra clearance for an objective bell, a bolt handle or a particular stock geometry.

The base uses steel construction, which gives the mounting interface a solid, wear-resistant contact surface. On a component that is repeatedly clamped to the rifle and used as the anchor point for the optic, that added robustness helps maintain a dependable fit over time. The matte finish keeps the appearance subdued and matches well with blued or matte-finished rifles and optics.

Its 0 MOA inclination makes this model a neutral mounting solution for ordinary zeroing distances and general-purpose field use. Instead of adding forward cant for specialized long-range adjustment, it keeps the optic level in a conventional position, which is often the right choice for hunting rifles, rimfires and everyday sporting setups. For anyone building a traditional scope installation on an 11 mm rail, this Osuma base provides the essential first step in a modular mounting system.

About Osuma

Osuma’s history dates to the early 1990s, when its owner developed the first mounts for his own hunting and benchrest shooting needs. The brand is based in Finland, and its products are designed and manufactured in Finland. Osuma remains a family business, having passed from father to son, and its main area of expertise is rifle scope mounting.

The company’s range covers scope mounts, scope rings, rail mounts, red-dot and holosight mounts, and suppressors. Across that lineup, Osuma focuses on practical mounting solutions for different rifle interfaces, including 11 mm, Tikka 17 mm, Sako, Picatinny, Optilock and Blaser systems. That specialization makes the brand particularly relevant to shooters looking for dedicated mounting hardware rather than general accessories.

Main Features

• Manufacturer: Osuma
• Made in: Finland
• In production since: 2022
• Material: Steel
• Color: Matte
• Inclination: 0 MOA

Warranty

10 years. This warranty period gives the Osuma base long-term coverage appropriate for a steel mounting component intended for regular rifle use.