Kastle Group FSM-RMR-12T-34™ 12 O’Clock Tall RMR Mount

The Kastle Group FSM-RMR-12T-34™ is a precision-machined 12 o’clock red dot mount designed to attach a Trijicon RMR footprint optic directly above a 34mm scope. The mount provides a clean, low-profile solution for adding a secondary red dot to a primary magnified optic while maintaining a streamlined and lightweight rifle configuration.

Part of the Kastle Group FORTRESS™ mounting ecosystem, the FSM-RMR-12T™ places the RMR optic at the 12 o’clock position on compatible scope mounts. The 34mm version is designed specifically for 34mm scope tubes.

Machined from 7075-T651 aluminum and finished with a Type III MIL-SPEC hardcoat anodized finish, the FSM-RMR-12T-34™ is built to provide a durable and lightweight mounting solution for modern rifle configurations. It is also 100% Made in the USA.

Key Features

• Designed for 34mm scope tubes
• Trijicon RMR footprint
• 12 o’clock / 90° mounting position
• Tall configuration
• Precision-machined 7075-T651 aluminum
• Type III MIL-SPEC hardcoat anodized finish
• Designed for the Kastle Group FORTRESS™ mounting ecosystem
• Available in multiple finishes
• 100% Made in the USA

12 O’Clock Red Dot Configuration

The FSM-RMR-12T-34™ allows a compact red dot to be positioned directly above the primary scope, giving the shooter an additional close-range aiming solution without requiring a traditional offset mount.

The 12 o’clock configuration is particularly useful for modern rifle setups where the primary optic is intended for magnified observation and precision while the red dot provides a faster aiming option for close-range engagements.

Rather than moving the secondary optic off to the side of the rifle, the FSM-RMR-12T-34™ keeps the red dot centered over the bore and maintains a clean, symmetrical configuration.

34mm Scope Compatibility

This version of the FSM-RMR-12T™ is specifically configured for 34mm scope bodies. Kastle Group also produces the FSM-RMR-12T™ in other ring diameters, allowing the same basic mounting concept to be used across different optic configurations.

Be sure to select the correct ring diameter for your scope before ordering.

Built for Modern Night Vision Setups

The ability to run a secondary red dot above a magnified optic can be especially useful on rifles configured for night vision. A dedicated red dot provides a fast aiming solution while leaving the primary optic available for magnified observation, identification, and longer-range shooting.

For shooters running night vision, the 12 o’clock configuration can also provide a natural transition between passive aiming and the magnified optic without adding a large amount of additional hardware to the rifle.

Durable, Lightweight Construction

The FSM-RMR-12T-34™ is machined from 7075-T651 aluminum, providing a strong and lightweight foundation for the optic. Kastle Group finishes the mount with a Type III MIL-SPEC hardcoat anodized finish for additional durability and corrosion resistance.

Specifications

• Model: FSM-RMR-12T-34™
• Optic Footprint: Trijicon RMR
• Scope Tube Diameter: 34mm
• Mounting Position: 12 o’clock / 90°
• Material: 7075-T651 Aluminum
• Finish: Type III MIL-SPEC Hardcoat Anodized
• Country of Manufacture: USA

Available Finishes

The FSM-RMR-12T™ is offered in several finish options, including:

• Black
• Flat Dark Earth
• Desert Sand
• Clear
• OD Green

Why Buy the Kastle Group FSM-RMR-12T-34™ from Custom Night Vision?

The Kastle Group FSM-RMR-12T-34™ is an excellent choice for anyone running a 34mm riflescope who wants to add a compact RMR-footprint red dot in a clean 12 o’clock configuration.

Its combination of 7075-T651 aluminum construction, RMR compatibility, 12 o’clock positioning, and MIL-SPEC finish makes it a natural fit for modern rifles, especially those configured around night vision, lasers, magnified optics, and passive aiming.

At Custom Night Vision, we specialize in night vision systems and the accessories used to build complete night-vision-compatible rifles. The FSM-RMR-12T-34™ is a simple and effective way to add a secondary red dot without compromising the primary optic setup.

Kastle Group FORTRESS™ | 34mm | RMR Footprint | 12 O’Clock | Made in the USA