Holosun HM3X-FDE 3x Mangifier/Flip & QD mount – FDE
- Rugged aluminium 3× magnifier designed for red dot sight enhancement
- Ambidextrous flip-to-side mount with quick-release Picatinny attachment
- Compatible with absolute and lower-1/3 co-witness heights (spacer included)
- IP67 water-resistant construction for all-weather reliability
- 2.75" eye relief with bright optics and 75% light transmission
The Holosun HM3X-FDE is a rugged 3× magnifier engineered to enhance the performance of your red dot sight by providing increased target identification and extended engagement capability. Housed in durable aluminium with an MAO surface finish and styled in Flat Dark Earth, it delivers a premium balance of clarity, reliability, and ease of use.
Designed for versatility, the HM3X features an ambidextrous flip-to-side Picatinny mount with a quick-release mechanism, allowing rapid transitions between magnified and unmagnified views. Holosun includes a spacer to ensure compatibility with both absolute and lower-1/3 co-witness heights, making it suitable for a wide range of red dot systems. With a generous 2.75" eye relief, 3× optical magnification, and IP67 environmental sealing, the HM3X-FDE is built to perform in demanding conditions. Windage and elevation adjustments enable precise alignment with your optic, while a built-in flat driver tool ensures easy on-the-go tweaks.
A simple, battery-free design guarantees consistent operation, making the HM3X-FDE an excellent choice for shooters seeking dependable magnification in a tough, mission-ready package.
- Power Source N/A
- Battery Type N/A
- Battery Life N/A
- Window Size N/A
- Dimensions 3.9 × 1.7 × 2.5 in
- Weight 9.8 oz
- Housing Material Durable Aluminium
- Surface Finish MAO
- Adjustment per Click N/A
- W&E Travel Range N/A
- Storage Temperature -21°C to 60°C
- Working Temperature -21°C to 60°C
- Submersion Rating IP67
- Vibration Resistance 1000G
- Transmittance 75%
- Field of View 7°
- Eye Relief 70 mm
- Exit Pupil 7.6 mm
- Magnification 3×
- Digital Zoom N/A
- Diopter N/A
- Durable Aluminium Housing: Strong, lightweight construction with MAO finish for long-term resistance to wear and environmental exposure.
- Flip-to-Side Mechanism: Instantly transition between magnified and unmagnified views with an ambidextrous flip design suited to both left- and right-handed shooters.
- Quick-Detach Picatinny Mount: Secure QD attachment allows fast installation and removal without tools.
- Height Compatibility Spacer: Included spacer supports absolute and lower-1/3 co-witness setups for maximum red dot compatibility.
- Bright, Clear Optics: Offers excellent clarity, 75% transmittance, and a comfortable exit pupil for enhanced visual performance.
- Precision Alignment: Integrated windage and elevation adjustments allow the magnifier to be perfectly aligned with your red dot’s point of aim.
- Generous Eye Relief: 70 mm of eye relief ensures comfortable and consistent positioning, even during dynamic shooting.
- No Battery Required: Fully optical system with no electronics, ensuring fail-proof reliability.
- IP67 Water Resistance: Ready for harsh field conditions, including rain, dust, and brief submersion.
- Built-In Adjustment Tool: Flat driver tool integrated into the design for convenient, tool-free adjustments.
- Holosun HM3X-FDE 3x Mangifier/Flip & QD mount – FDE
- HOLOSUN Limited Lifetime Warranty
Our aim is to ensure that your order arrives with you as soon as possible and in the safest, most cost-effective means.
Please Note: Shipping charges may be subject to additional surcharges if out of area or over weight restrictions.
Please Note: DPD SHIPMENTS REQUIRE THE CUSTOMER TO SHOW A PIN CODE ON DELIVERY - READ MORE: HERE
COURIERS
![]() |
![]() |
![]() |
![]() |
We use DPD , RoyalMail, TNT and UPS courier services for all our orders whether dispatching to the UK or International. As soon as your order has been dispatched you will receive an email with your unique tracking number. We are unable to add delivery notes to your order regarding safe spaces or neighbour deliveries. If you require this service it can be arranged directly with the courier once the parcel is in their network.
IN-STORE ITEMS
These are items that we have in-stock and will be sent out for delivery as soon as possible. We aim to dispatch all orders within 1-2 working days, but during busy periods dispatch may be delayed by a day or so. If you would like to purchase the item in person then please call ahead to arrange an appointment: 01803 611 895.
PRE-ORDER ITEMS
These are usually items that are going to be out-of-stock for a number of weeks or are in short supply. By purchasing a Pre-Order Item you are in effect paying a deposit for your goods. As soon as the item is back in stock yours will be dispatched within 24 hours where possible. Please see individual product pages for current back-in-stock dates. In rare occasions, these dates can be changed by the manufacturers so we recommend staying in contact with Optics Warehouse depending on the product lead time.
INTERNATIONAL DELIVERY & TAXES
In addition to the above information If your delivery address is outside of the UK you may be subject to import duties and taxes, which are levied once a shipment reaches your country. Any such additional charges for customs clearance must be borne by you. You should note that customs policies vary widely from country to country. Optics Warehouse advises each customer to contact their local customs office for further information if they are in any way unsure of local duties or liabilities. Cross border shipments are subject to opening and inspection by customs authorities which means some packages may be opened and re-sealed.
NEED HELP?
If you require any further assistance, please call us on 01803 611 895 or email sales@opticswarehouse.co.uk
-
A NOTE ABOUT DPD SHIPMENTS:
- Please be advised that we have now introduced DPD Pins to all DPD orders from Optics Warehouse.
- If your shipment is being sent from Optics Warehouse via DPD you will be sent a Pin Code that must be shown to the courier upon delivery.
- The pincode is sent VIA email & TEXT message. A valid email address and mobile number must be provided at checkout. Emails will be sent from "Riviera House 3PL" - if you do not receive this email please check your junk or spam folders.
- Please note that if you do not display your pin code to the courier driver upon delivery, you will not be able to have your item and you may need to schedule another delivery date to show a valid pin.
- Please view the attached slides HERE for further information!

















