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Questions & Answers
Will this work with Holosun 510c Featured Answer

yes this will work with any absolute co witness or lower 1/3rd co witness.

by KIRKN8R, Verified Owner, April 8, 2019
Will this magnifier work with a holosun hs506 ? Expert Answer

Yes, the magnifier will work with that red dot.

by Armando R., Gear Expert, March 13, 2020
Customer Reviews
Expert Review
Great glass for a reasonable price by Julia, Gear Expert, December 15, 2020
I've had this mounted for about a year now and really like it. Pairs well with a red dot for longer shots as well as for target identification for people with relatively poor vision like myself. Seems very durable, and I haven't had any issues with t...
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13/13 found this helpful
Helpful Positive Review
Great glass at a good price! by Greg Knittel, Verified Owner, February 24, 2024
This is not my first magnifier but is my first from Holsun. I also have the sig Juliet 3x magnifier paired with a Romeo 4s red dot and a vortex 3x magnifier installed with a vortex red dot so I have the pleasure of being able to compare these three s...
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15/15 found this helpful
Helpful Positive Review
Holosun 3X by mrapp, Verified Owner, June 21, 2023
best magnifier made ! clear glass, best flip to side mount made no awkward buttons to push just flip out flip back ! QD mount as well, what more could you want ? great durable rubber caps and has proven very durable...I recommend.
1/2 found this helpful
Helpful Positive Review
Works as intended by Patrick, Verified Owner, September 19, 2025
It's a 3x magnifier and it works. Say what you want, feel how you want to feel about Holoson but it's solid, had zero issues with fitment on my rail. Works perfectly with my green dot (Holoson). If you want something built well and reliable that won'...
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1/1 found this helpful
Helpful Positive Review
AWESOME MAGNIFIER by Jason Peterson, Verified Owner, June 21, 2025
I put this on my son's 300 blackout that I built for him since his passing and I tell you what... where has this been the whole time I've been shooting. I had a friend of mine with me and he said that he needs one for his rifle now as well. Highly re...
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2/2 found this helpful
Helpful Positive Review
this thing is so clear. bought it at my ffl dealer shop when I was picking up my aero a4 lower and saw this beauty for 199. I asked him if I could take a look at it and he told me he had just put it on display a half hour ago. I jumped all over it. ...
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54/57 found this helpful
Read All 140 Reviews
Included Accessories:
QD Mount and Spacer
Height:
2.4 in
Color:
Black
Condition:
New

Code: 28Y-RDM-HM3XTRDM-HM3X

MPN: HM3X

UPC: 605930625271

List: $235.28Save 15%
$199.99

Product Info for Holosun HM3X 3x Red Dot Sight Magnifier

The HM3X is an aluminum bodied 3X magnifier designed for use in conjunction with a red dot sight. The HM3X is feature-packed and includes a quick release, ambidextrous, flip-to-side Picatinny rail mount. Holosun includes a spacer with the HM3X that provides compatibility with absolute and lower 1/3 co-witness dot heights for maximum compatibility. The HM3X has a generous 2.75” of eye relief, is IP67 certified water resistant, and includes windage and elevation adjustment for precision zeroing to your optic’s zero. The HM3X also includes a built-in flat driver tool for easy adjustments.image

Specifications for Holosun HM3X 3x Red Dot Sight Magnifier:

Manufacturer: Holosun
Finish: Aluminum
Magnification: 3 x
Eye Relief: 2.75 in
Length: 3.9 in
Weight: 9.8 oz
Field of View, Linear: 37 ft at 100 yds
Field of View, Angle: 7 degrees
Weather Resistance: Yes
Fabric/Material: Aluminum
Included Accessories: QD Mount and Spacer
Width: 1.6 in
Height: 2.4 in
Color: Black
Operating Temperature: -22 - 140 Fahrenheit
Exit Pupil: 0.29 in
Diopter Adjustment Range: -3 - 3 dpt
Condition: New
Water Resistance Level: IP67
Lens Material: Optical Glass
Storage Temperature: -40 - 158 Fahrenheit
Magnification Type: Fixed

Features of Holosun HM3X 3x Red Dot Sight Magnifier:

  • Flip to the Side design
  • Outstanding Specification & Clarity
  • QD Mount and Spacer Included
  • IP67 Certified
  • Compatible with Absolute and Lower 1/3 Height Optics

Package Contents:

  • Holosun HM3X 3x Red Dot Sight Magnifier
  • QD Release Mount
  • T10 L Key
  • User Manual

Holosun HM3X 3x Red Dot Sight Magnifier Orderable Models

List of Orderable Models

  • Holosun HM3X Red Dot Magnifier, 3X, Integrated QD Mount w/Optional Spacer, Black, HM3X , MPN: HM3X , UPC: 605930625271 , Code: 28Y-RDM-HM3XTRDM-HM3X
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