Clamp: chosen by the riflescope
The clamp sits on the objective tube of the riflescope and is chosen by its outside diameter, not by the lens diameter.
| Item information | Value |
|---|---|
| Category: | OPTICS |
Fixed clamp adapter · Modular system · 3 screws
Fixed modular clamp adapter MAR-FX by Rusan (3 screws, no quick-release lever) for the riflescope objective tube, in 39 sizes from 30 to 67 mm, including rail versions. A complete adapter needs an MCR connector matching the clip-on device.

Choose by the outside diameter of the objective tube (not the lens diameter). Regular sizes are given in millimetres, rail versions with the Rusan code (for example 30ZM-1). Only the selected adapter is supplied; the MCR connector is a separate item.
Modular Rusan system
The modular Rusan system has two parts: the clamp for the riflescope (MAR, MAR-SH or MAR-FX) and the MCR connector for the clip-on device. Rusan states that both have to be combined to have a complete system.
The clamp sits on the objective tube of the riflescope and is chosen by its outside diameter, not by the lens diameter.
The connector matches the thread or bayonet of the clip-on device. A P at the end of the product code means a built-in orientation (rotation) of the device, according to Rusan.
The locking nut of the clamp is turned to UNLOCK, the connector is put into the slots and the nut is turned to LOCK. According to the instructions one finger with moderate feeling is enough.
One clip-on device on several rifles, one rifle with several clip-on devices, exchanging between rifles and devices without losing precision, and fast mounting and dismounting in the dark.
At Rusan MAR-FX is the fixed version with three screws; the quick-release version is called MAR.
Rusan marks the clamps with the outside diameter of the objective tube, not with the lens size. Every clamp can be adjusted by +/- 0.2 mm, not more.
For riflescopes with rail Rusan lists among others the codes 30ZM-1 to 30ZM-4 and 34SR; which riflescope belongs to which code is stated in each version.
The three screws are loosened to a gap of about 3 to 4 mm; the middle screw is tightened first, then the other two, with a torque limit of 1.2 Nm.
The clamp is only one half of the system: according to Rusan a complete adapter also needs the connector (MCR) that matches the thread or bayonet of the clip-on device.
Rusan lists: one clip-on device on several rifles, one rifle with several clip-on devices, exchanging without losing precision, fast mounting in the dark and no need to rotate the clip-on device when locking it.
Without an MCR connector the adapter is not complete: the connector is chosen by the thread or bayonet of the clip-on device. The version with quick-release lever (MAR) is a separate Rusan product.
* Firearms, mounts and other accessories shown are not included unless expressly listed. The selected item variant and the described scope of delivery are decisive.
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