Holosun HM3X 3x Magnifier QD Flip-to-Side Mount Black
£209.99
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Holosun HM3X 3x Magnifier QD Flip-to-Side Mount Black
£209.99
At a glance
- Sight type
- Magnifier
- Delivery within 10 business days
- Estimated delivery:
- 30-day returns
- UK-based specialist support
- Pay in 3 interest-free payments of £69.99 with Klarna
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Details
Description
Rugged, aluminium and sensibly priced, the Holosun HM3X Magnifier is the straightforward way to put 3x behind a red dot or holographic sight. Around 2.75 in of eye relief and a 7° field of view keep the picture workable, the housing is IP67-rated, and the whole thing flips aside on its QD mount the moment you want 1x again.
How It Compares
The same 3x in a lighter titanium body is the HM3XT. If 3x is not enough reach, there is the 6x HM6X. Everything else sits under magnifiers, and choosing a red dot magnifier runs through the trade-offs.
Ideal For
- Adding 3x reach to a red dot you already own
- AR-15 and carbine builds
- Switching between 1x and 3x on the clock
- Builds where budget matters more than grams
Key Features
- 3x magnification
- Flip-to-side QD mount with adjustable co-witness height
- ±3 diopter adjustment
- Around 2.75 in eye relief and a 7° field of view
- IP67-rated aluminium housing
Technical Specifications
- SKU / MPN / UPC: SKU HM3X / MPN HM3X / UPC 605930625271
- Magnification: 3x
- Eye relief: ~2.75 in; 7° field of view
- Mount: Flip-to-side QD, adjustable co-witness height
- Diopter: ±3 adjustment
- Housing: Aluminium, IP67
What's Included
- Holosun HM3X magnifier
- Flip-to-side QD mount
Why buy from Red Dot Sight UK
A UK specialist in red dot sights, holographic sights and magnifiers from Trijicon, EOTech, Holosun and SIG Sauer — genuine optics, secure checkout and UK-based support.
The detail
Technical Specifications
| Sight type | Magnifier |
|---|---|
| Finish | Black |
| Brand | Holosun |
| Type | Red Dot Sight Magnifier |
| SKU | HM3X |
Fitment
Compatibility
Mounting Footprint
Confirm the optic's footprint matches your firearm's cut or plate.
Rail Compatibility
Pair with a matching Picatinny mount for rifle and carbine platforms.
Always confirm your firearm's optic cut or rail matches the footprint before purchase. Our guide to red dot sight footprints explains how to match an optic to your firearm. If unsure, contact our team for fitment advice.
Complete Your Setup
Help & guidance
Product FAQs
Should I get the HM3X or the HM3XT?
Both magnify 3x, but the HM3XT is the titanium build and the lighter of the two, while the HM3X is the standard aluminium version. The HM3X suits builds where budget matters more than grams.
How much eye relief does the Holosun HM3X give?
It gives around 2.75 inches of eye relief, with a 7 degree field of view. That keeps the picture workable behind a dot sight.
Do I have to remove the HM3X to shoot at 1x?
No. It flips to the side on its QD mount, so going back to 1x is a flick of the thumb.
Will the HM3X work with my sight?
It pairs with most red dots and holographic sights. The HM3X is the straightforward way to put 3x behind a red dot or holographic sight.
What magnification is the Holosun HM3X?
The HM3X is a 3x magnifier. If 3x is not enough reach, the 6x HM6X is the alternative.
Does the HM3X have diopter adjustment?
Yes, the HM3X has plus or minus 3 diopter adjustment. That lets you focus the image to your eye.
Is the HM3X waterproof?
The HM3X has an IP67-rated aluminium housing. It is built to be rugged for carbine use.
Does the HM3X mount adjust for co-witness height?
Yes, the flip-to-side QD mount has adjustable co-witness height. The mount is included with the magnifier.
What is included with the Holosun HM3X?
The package includes the Holosun HM3X magnifier and its flip-to-side QD mount. No separate mount purchase is needed.
What is the HM3X best suited to?
It suits adding 3x reach to a red dot you already own, particularly on AR-15 and carbine builds. It is also aimed at shooters switching between 1x and 3x on the clock.
How long will my HM3X take to arrive?
Estimated UK delivery is 10 business days. It ships as genuine UK stock, so there are no import fees to pay on arrival. Checkout is secured by Shopify.
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Further reading
Guides picked for this optic - the brand range, the format, and how to set it up.
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Shipping, Returns & Warranty
Orders are dispatched from the UK. Full details, options and timescales are on our shipping policy.
If something isn't right, our returns policy explains how to arrange a return or exchange.
Every order is covered by our 30-day returns policy and your statutory consumer rights. Some products are also supplied with a manufacturer warranty; that cover is provided by the manufacturer rather than by Red Dot Sight UK and varies by brand.