Magne-Tech 30x38.5mm 3x Magnetic Ring Mount Part B Only (Female)
The Magne-Tech 30×38.5mm 3× Magnetic Ring Mount (Part B – Female) is a precision-engineered quick-detach riflescope mounting component designed to provide secure, repeatable optic positioning. Featuring Magne-Tech's innovative magnetic mounting technology, this female ring mount pairs with the separately available 3-Magnet Magnetic Locking Picatinny Rail Mount Receiver (Part A – Male) to create a versatile quick-detach scope mounting system.
Designed for riflescopes with a 30mm main tube diameter, the mount positions the optic centreline 38.5mm above the Picatinny rail. Its precision-machined 7075-T6 aluminium construction and MIL-A-8625 Type III hard-coat anodised finish deliver excellent strength, wear resistance and durability.
When combined with a compatible Magne-Tech receiver, the system allows users to remove, reinstall or interchange compatible optics while maintaining repeatable positioning. This makes it ideal for hunters, precision shooters and those using multiple daytime, night-vision or thermal riflescopes.
Key Features
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Magnetic Quick-Detach System: Works with Magne-Tech's 3-Magnet receiver to enable rapid, tool-free removal and reattachment of mounted optics.
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Precision Return-to-Zero: Engineered to maintain consistent alignment between mounting cycles, with manufacturer-qualified zero shift within 0.25 MOA under specified recoil conditions.
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30mm Scope Tube Compatibility: Specifically designed for riflescopes featuring a 30mm main tube diameter.
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38.5mm Centreline Height: Positions the centre of the scope tube 38.5mm above the rail when paired with the compatible Picatinny receiver.
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Three-Magnet Mounting Interface: Designed to interface with the matching receiver's three high-strength rare-earth magnetic mounting points.
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Dual-Redundant Locking System: The complete Magne-Tech mounting assembly incorporates a mechanical locking system to provide secure retention alongside magnetic alignment.
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7075-T6 Billet Aluminium: Precision-machined aerospace-grade aluminium construction provides excellent mechanical strength and durability.
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Type III Hard-Coat Anodising: MIL-A-8625 Type III finish provides improved surface hardness, corrosion resistance and protection against wear.
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Flexible Optic Positioning: Extended mounting geometry allows flexibility when positioning compatible riflescopes for appropriate eye relief.
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Modular Design: Multiple compatible female ring mounts can be used with a single Magne-Tech receiver, allowing different pre-mounted optics to share a mounting platform.
Technical Specifications
| Specification | Details |
|---|---|
| Brand | Magne-Tech |
| Model | 3× Magnetic Ring Mount |
| Manufacturer Part Number | MT-30-65-385-RINGMOUNT |
| Component | Part B – Female |
| Mount Type | Magnetic quick-detach scope ring mount |
| Scope Tube Diameter | 30mm |
| Scope Centreline Height | 38.5mm above Picatinny rail |
| Magnetic Interface | Magne-Tech 3-Magnet system |
| Compatible Receiver | Magne-Tech 3-Magnet Magnetic Locking Picatinny Rail Receiver (Male) |
| Rail Compatibility | MIL-STD-1913 Picatinny, via compatible receiver |
| Material | 7075-T6 billet aluminium |
| Surface Treatment | MIL-A-8625 Type III hard-coat anodising |
| Locking System | Magnetic alignment with mechanical locking when assembled with matching receiver |
| Return-to-Zero Performance | Within 0.25 MOA under manufacturer-specified test conditions |
| Qualified Recoil Class | Up to .308 Winchester equivalent free recoil energy |
| Ring Mount Weight | 6.5 oz (approximately 184g), per Magne-Tech US product specification |
| Ring Screw Torque | 15 in-lb |
| Ring Fastener Specification | M3 × 0.5 × 12mm, Grade 12.9 |
| Configuration | Female ring mount only – receiver sold separately |
Return-to-Zero Performance
Magne-Tech's magnetic mounting system is designed to provide repeatable optical alignment after removing and reinstalling a riflescope.
When paired with the matching 3-Magnet receiver, the system uses precision-machined mating surfaces and high-strength rare-earth magnets to guide the optic into a consistent mounting position.
Magne-Tech specifies repeatable zero shift within 0.25 MOA for configurations operating with free recoil energy equivalent to or below that of .308 Winchester. Actual field performance depends on the firearm, optic, installation and operating conditions.
Compatibility
This female ring mount is designed for use with:
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Riflescopes featuring a 30mm main tube diameter.
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Magne-Tech 3-Magnet Magnetic Locking Picatinny Rail Mount Receiver (Part A – Male).
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Compatible rifle platforms equipped with a MIL-STD-1913 Picatinny rail and matching Magne-Tech receiver.
The female ring mount attaches to the riflescope and remains installed during normal optic changes. The separate male receiver attaches to the rifle and provides the magnetic quick-detach interface.
Package Contents
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1 × Magne-Tech 30×38.5mm Magnetic Ring Mount (Part B – Female)
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1 × 2.5mm Allen Key
Required Separately: Magne-Tech 3-Magnet Magnetic Locking Picatinny Rail Mount Receiver (Part A – Male).
Installation Specification
Ring Mount Screw Torque: 15 in-lb.
Use the manufacturer's recommended fasteners and installation procedure. Correct ring alignment and torque are essential for secure optic mounting and consistent performance.
Important: This product is Part B (Female) only and does not include the 3-Magnet Picatinny Rail Receiver (Part A – Male). Both components are required to form a complete magnetic quick-detach scope mounting system.
Jacobs Digital is a speciality on-line retailer, as well as a brick-and-mortar retail store, operating in the same Auckland, NZ location for over 40 years.
9 Mokoia Road
Birkenhead
Auckland 0626
New Zealand
+64 (9) 480-5903
