Holosun HM3X 3x Magnifier QD Flip-to-Side Mount Black
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The Holosun HM3X is a 3x magnifier supplied on an ambidextrous quick-detach flip-to-side mount, made to sit behind a red dot or holographic sight.
Swung in it gives you 3x for identifying what you are looking at; swung out it is gone and the dot is back at 1x, and neither movement touches your zero.
The body is aluminium in a black finish, 4 in overall and 9.8 oz (278 g) with its mount, and Holosun rates it IP67 and nitrogen-purged rather than merely weather-resistant. The mount is quick-detach and ambidextrous, and a spacer in the box switches it between absolute and lower 1/3 co-witness height.
Eye relief is 70 mm (2.75 in) across a 7 degree field of view, which is the most forgiving eye box in Holosun’s magnifier range and the reason most shooters take 3x over 6x. A dioptre adjustable through ±3D sharpens the picture for your eye, and windage and elevation adjust in 0.5 MOA clicks through ±50 MOA of travel so the dot can be centred in the view. Holosun quotes a 7.6 mm exit pupil rather than an objective diameter, so no objective figure is given here. Remember the magnifier has no reticle of its own — it only enlarges what the sight in front of it projects.
It works behind most red dot and holographic sights as long as the two share a mount height, which is what the supplied spacer is for. For the same 3x in a shorter, lighter body see the HM3X Micro, and for twice the reach with a tighter eye box the HM6X. More sit in red dot magnifiers and straight-pull rifle optics.
| Magnification | 3x, fixed |
|---|---|
| Eye relief | 70 mm (2.75 in) |
| Field of view | 7 degrees |
| Exit pupil | 7.6 mm |
| Dioptre | Adjustable, ±3D |
| Adjustment | 0.5 MOA per click, ±50 MOA travel |
| Mount | Ambidextrous QD flip-to-side, spacer for absolute and lower 1/3 |
| Housing | Aluminium, black |
| Sealing | IP67, nitrogen-purged |
| Overall length | 4 in |
| Weight | 9.8 oz (278 g) |
| MPN | HM3X |
The straightforward way to make a red dot rifle useful past the range at which a dot covers the target. Order the HM3X today — imported from the USA with all duties paid by us and dispatched tracked from the UK in 7–10 business days, with nothing to pay on delivery.
Explore more: Red Dot Magnifiers, HM6X 6x Magnifier or browse all Holosun
| Brand | Holosun |
|---|---|
| Part no. | HM3X |
| Category | Magnifier |
| Barcode | 605930625271 |
£5 tracked UK delivery on every order via Royal Mail Tracked 24. Our products are ordered in from the manufacturer rather than held in UK stock, so please allow 7 to 10 business days (Monday to Friday, excluding bank holidays) from the date of your order for it to reach you. Tracking details are emailed on dispatch. UK delivery only.
You have 30 days from receiving your order to cancel it for any reason, then 14 days to send it back unused and in its original packaging. Faulty, damaged or incorrect items are replaced or refunded and we cover reasonable return postage. Refunds go back to your original payment method within 14 days of receiving the return.
7 to 10 business days from the date of your order. Every order is sent Royal Mail Tracked for a flat £5 and you receive tracking details by email when it is dispatched.
Yes. We list only genuine parts and optics from the brands shown, ordered in from the manufacturer for your order.
Compatibility notes on this page come from the manufacturer. If you are unsure, email us with your make and model before ordering and we will check rather than guess.
Yes. Bundle & Save applies automatically in your basket: 5% off when you buy 2 items, 10% off at 3 items and 15% off at 4 or more. It works across the whole range, so you can mix and match, and there is no code to enter.
Yes — you have 30 days from delivery to cancel for any reason, as long as the item is unused and in its original packaging. See our returns policy for the details.
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