Picatinny Ring Mount | 40 mm | Screw

This mount is manufactured according to the NATO STANAG 2324 / MIL-STD-1913 standard (Picatinny). This means it is compatible with all standard Picatinny mounts, rings, and accessories – regardless of manufacturer.

The Picatinny standard ensures that you can freely combine rails, mounts, and optics from different manufacturers. This gives you the flexibility to upgrade or change your scope without changing the mount.

Picatinny vs. Weaver:

Picatinny and Weaver are similar but not the same. The difference lies in the recoil slots:
• Picatinny: Slots are 5.23 mm wide with a center distance of 10.01 mm (fixed standard)
• Weaver: Slots are 4.57 mm wide with variable spacing (no fixed standard)

A Weaver mount can often be mounted on a Picatinny rail because the Weaver lug is narrower than the Picatinny slot. However, a Picatinny mount will NOT fit on a Weaver rail – the lug is too wide.

This mount is Picatinny and fits all rails manufactured according to MIL-STD-1913 / STANAG 2324.

See compatible mounts:Scope mounts

This mount is made of steel. Steel is the classic choice and offers high rigidity and wear resistance. The material can withstand repeated assembly and disassembly without deforming the contact surfaces.

Steel is heavier than aluminum, but for a ring mount, the weight difference is practically minimal.

This assembly is blued. Bluing, also known as black oxidizing, is a chemical surface treatment that provides a nice, matte black finish and a certain degree of corrosion protection. It is the most traditional surface treatment for firearm parts.

Bluing is less resistant than QPQ and requires a bit more care – a thin layer of oil after use in damp weather will keep the surface in good condition.

These rings have an internal diameter of 40 mm and are suitable for binoculars with 40 mm tubes.

Always check your binocular's tube diameter before purchasing – it can be found in the binocular's specifications or easily measured with a caliper.

Installation is simple. The rings are attached to the Picatinny rail, and the scope is placed in the lower ring halves, after which the upper halves are tightened.

Manufacturer's recommendation:
• Torque for ring screws (top, M3.5): 1.8–2.0 Nm
• Torque for mounting against rail (M4): 2.0–2.5 Nm
• Ensure the scope is level and has correct eye relief before final tightening

A torque wrench is necessary for proper installation. Overtightening can damage the scope tube.

Scope mounting:Read the guide here

Rusan is a Croatian manufacturer with over 30 years of experience in precision mounts for rifles. All products are manufactured in-house on modern CNC machines from solid material – without casting or metal injection. Rusan is known for tight tolerances, high repeatability, and an unusually wide range of rings, mounts, and adapters for night vision optics.

Read more about Rusan here: Rusan

See all products from Rusan: Rusan Collection