The Holosun HM3X Micro 3x Magnifier (HM3X-MICRO) is a 3x flip-to-side magnifier in a shortened, lightened body — 2.76 × 2.44 × 1.81 in (70 × 62 × 46 mm) and 8.47 oz (240 g) — giving the same 3x reach as the full-size HM3X while taking up less rail and less weight.
The QD flip-to-side mount is ambidextrous, so it can swing clear to either side, and a supplied spacer sets it to 1.41 in absolute or 1.63 in lower-1/3 co-witness. A ±3 dioptre sharpens the picture for your eye, and the 7075 T6 aluminium body is nitrogen-purged and rated IP67.
How It Compares
The full-size HM3X 3x magnifier gives the same magnification in a larger housing, and the HM6X 6x magnifier doubles the reach. Pair the HM3X Micro with any enclosed red dot sight, browse all red dot sight magnifiers, or read our guide to choosing a red dot magnifier.
Ideal For
- Lightweight straight-pull AR-pattern and pistol-calibre carbine builds
- Civilian Service Rifle and practical rifle, where rail space is at a premium
- Airsoft rifles where added weight is felt over a long skirmish day
- Shooters who run 1x most of the time and want magnification only occasionally
Key Features
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Magnification: 3x, with a 7.1 mm exit pupil and 7 degree field of view
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Size: micro body at 8.47 oz (240 g)
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Mount: ambidextrous flip-to-side QD mount, flips clear either way
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Height: 1.41 in absolute or 1.63 in lower-1/3, spacer included
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Focus: ±3 dioptre adjustment
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Housing: 7075 T6 aluminium, nitrogen-purged, IP67 rated
Technical Specifications
| Magnification |
3x (fixed) |
| Exit Pupil |
7.1 mm |
| Eye Relief |
67 mm (2.64 in) |
| Field of View |
7 degrees |
| Dioptre Adjustment |
±3 dioptre |
| Mount Type |
Ambidextrous flip-to-side QD mount, 1.41 in absolute / 1.63 in lower-1/3 |
| Dimensions |
2.76 × 2.44 × 1.81 in (70 × 62 × 46 mm) |
| Weight |
8.47 oz (240 g) |
| Housing / Finish |
7075 T6 aluminium, nitrogen-purged, IP67 rated |
| MPN / UPC |
HM3X-MICRO / 810047074809 |
What's Included
- Holosun HM3X Micro magnifier with QD flip-to-side mount
- Lower-1/3 spacer, multi-tool, lens cloth, manual
UK Delivery & Support
Imported from the USA, duty paid by us, and dispatched tracked from the UK — nothing to pay on delivery — backed by UK-based support.
Frequently Asked Questions
How does the Holosun HM3X Micro differ from the standard HM3X?
The Holosun HM3X Micro gives the same 3x magnification in a substantially smaller and lighter housing — 8.47 oz (240 g) against the full-size HM3X's 9.8 oz (278 g) — which suits builds where rail space and weight matter.
What mount heights does the Holosun HM3X Micro support?
The Holosun HM3X Micro sets to 1.41 in for absolute co-witness or 1.63 in for lower-1/3 co-witness using the supplied spacer, so it can be matched to the height of the sight in front of it.
Is the Holosun HM3X Micro weatherproof?
Yes. The Holosun HM3X Micro has a 7075 T6 aluminium body that is nitrogen-purged against internal fogging and rated IP67 for water and dust resistance.
Does the Holosun HM3X Micro have its own reticle?
No. The Holosun HM3X Micro has no reticle of its own — it magnifies whatever your red dot sight is projecting, and flipping it in or out does not affect that sight's zero.
Can the Holosun HM3X Micro flip to either side?
Yes. The QD mount on the Holosun HM3X Micro is ambidextrous, so the magnifier can be set to swing clear to the left or the right to suit a left- or right-handed shooter.
