Steyr Arms 2 Piece Base, SM12 and CL II

• Two-piece base design: Keeps the loading and ejection area open, which helps preserve easy access to the action while providing a stable platform for compatible scope mounts.
• Made for Steyr Original Pivot Scope Mounts: Gives the rifle a direct interface for the original pivot system, making it a practical choice for hunters who want a mount setup matched to Steyr actions.
• Compatibility with SM12 and CL II rifles: Fits a broad range of Steyr short, medium, long and magnum-length variants, which simplifies optic installation across several rifle configurations.
• 0 MOA inclination: Maintains a neutral mounting angle that suits general hunting rifle setups and straightforward sight-in with conventional scope adjustment ranges.
• Black finish: Provides a subdued appearance that matches the rifle and mounted optic while helping the base blend into a practical field setup.

About the Steyr Arms Mounts Series

Steyr Arms Mounts are built as dedicated rifle accessories for attaching optical sights to compatible STEYR rifles. Within the company’s accessory range, the series covers mounting solutions for hunters and sporting shooters who want a factory-matched interface rather than a generic base. The common idea behind the line is straightforward fit, secure attachment and compatibility with the rifle platforms for which the mounts were designed.

Across the wider series, STEYR also offers systems such as the Monobloc Flex Mount, which uses a single base with interchangeable upper parts. That approach shows the family’s emphasis on adapting the rifle to different optic formats, including 30 mm rings and rail-based scope interfaces. Other STEYR mounting solutions also support quick-detach configurations or Picatinny-based setups, depending on the model. In practice, the series is aimed at shooters who want a mounting system that follows the design logic of the rifle itself: clean integration, repeatable positioning and compatibility with common hunting optics.

About the Steyr Arms 2 Piece Base, SM12 and CL II

The Steyr Arms 2 Piece Base, SM12 and CL II is a dedicated mounting base for rifles that use the SM12, CL II and related Steyr action patterns listed in its compatibility range. Its role is simple but important: it creates the correct interface between the rifle receiver and Steyr Original Pivot Scope Mounts, allowing the optic setup to start with a base designed around the rifle rather than adapted from a universal pattern.

The two-piece construction is especially well suited to traditional hunting rifle layouts because it leaves the central action area more open than a full-length rail. That can help maintain easier access around the loading port and preserves a cleaner, lower-profile appearance on the rifle. For many field rifles, this style also keeps the mounting solution focused on what is needed for a conventional scoped setup without adding unnecessary bulk.

With 0 MOA inclination, the base is intended for standard sighting arrangements where a neutral mounting angle is preferred. That makes it a sensible match for stalking, driven hunting and general sporting use, where the priority is a straightforward zero rather than a canted long-range rail. Finished in black, it integrates neatly with the rifle and optic, giving compatible Steyr hunting rifles a mounting foundation that is purpose-built, visually discreet and mechanically appropriate for original pivot-mount use.

About Steyr Arms

Steyr Arms was founded by Josef and Franz Werndl in 1864 in Oberletten, Austria. The company’s headquarters, research and development, and production are in Kleinraming, Austria. Over time, STEYR built its reputation across hunting, sporting and precision firearms, while also producing pistols and firearms for police and military use.

The company has a long connection with notable rifle designs. Production of the Mannlicher-Schoenauer hunting rifle began in 1903, and STEYR later introduced the SSG 69 as a precision rifle with a compound stock. It also became widely known for the STEYR AUG, adopted by the Austrian Federal Army in 1977 as the StG 77. The company changed its name from STEYR MANNLICHER to STEYR ARMS on January 1, 2019, reflecting a modern brand identity while continuing its established focus on rifle design and manufacturing.

Main Features

• Manufacturer: Steyr Arms
• Series: Steyr Arms Mounts
• Made in: Germany
• Color: Black
• Inclination: 0 MOA
• Compatible upper interface: Steyr Original Pivot Scope Mounts
• Compatible rifles: Steyr SM 12 SL, Steyr SM 12 L, Steyr SM 12 M, Steyr SM 12 S, Steyr CL II SL, Steyr CL II L, Steyr CL II M, Steyr CL II S, Steyr Mannlicher Classic L, Steyr Mannlicher Classic M, Steyr Mannlicher Classic S, Steyr Mannlicher Classic SL, Steyr Pro Hunter L (Before 2003), Steyr Pro Hunter L (After 2003), Steyr Pro Hunter M (Before 2003), Steyr Pro Hunter M (After 2003), Steyr Pro Hunter S (Before 2003), Steyr Pro Hunter S (After 2003), Steyr Pro Hunter SL (After 2003)

Warranty

2 years. This mounting base is covered by a two-year warranty period.