The ERA-TAC Aluminum Scope Ring with Universal Interface 34 mm (part number 03680-5734, manufactured by Recknagel) is a heavy-duty, two-piece middle tube scope ring machined from solid aircraft-grade aluminum. Finished with a Mil-Spec Type III hard-anodized matte black coating, this mechanical firearm accessory clamps directly around standard 34 mm rifle scope tubes. Built with an integrated top mounting pattern, the ring provides a rigid platform for mounting auxiliary sighting systems, accessory rails, and tactical equipment directly to the primary optic.

Key Features

• Universal-Interface Mounting Surface: Features ERA-TAC’s proprietary top-mounted interface pattern, designed to accept secondary Picatinny accessory rails, micro red dot sight (MRDS) adapters, rangefinder saddles, angle-cosine indicators, or infrared illuminators.
• Rotational Flexibility: Because it clamps onto the cylindrical scope body, the ring allows full 360-degree radial orientation, letting users position secondary platforms at a 12 o'clock piggyback, 45-degree offset, or 90-degree lateral configuration prior to torquing.
• Durable Mil-Spec Construction: Machined from solid high-grade aircraft aluminum and treated with a hard-anodized matte black surface to resist harsh field conditions and heavy mechanical wear.
• Middle Tube Half-Split Design: Employs a secure two-piece configuration that clamps from both sides over tubular scope sections.

Product Specifications

• Manufacturer Part Number: 03680-5734
• Main Tube Diameter: 34 mm (1.339")
• Ring Width: 18 mm
• Base Height (Profile): 3 mm (measured from the bottom of the interface mount surface)
• Mounting Interface: ERA-TAC Universal-Interface
• Split Type: Middle tube half-split (two-piece, dual-side clamp)
• Material: Aircraft aluminum
• Finish: Hard-anodized matte black (Mil-Spec Type III)
• Power Requirements: None (purely mechanical)

Who is the Era-Tac Aluminum Scope Ring With Universal Interface 34mm for?

• Long-range precision shooters using PRS or ELR disciplines — requires a low-profile 3 mm base height to attach auxiliary rangefinder saddles or level indicators directly over a 34 mm riflescope tube without adding unnecessary vertical bulk to the primary optical centreline.
• Tactical and duty rifle operators mounting piggybacked micro red dot sights — benefits from an 18 mm ring width and a dedicated 34 mm tactical scope ring interface that allows 360-degree radial alignment, enabling quick transitions to a 12 o'clock or 45-degree secondary optic.

Less suitable for: Riflescopes with non-standard main tube diameters such as 30 mm, 35 mm, or 36 mm, which require their respective size-matched ring variants, as well as optics equipped with integrated rail bases like Zeiss ZM/VM or Swarovski SR systems that cannot fit a middle tube half-split clamp and instead require single-side-split objective rings.