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  • Post last modified:August 13, 2023
holosun hm3x with leupold lco

In this Holosun HM3X magnifier review guide, let's take a look at its core specs, glass quality, durability and overall feel.

Let's check it out:

Core Specs

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  • Magnification - 3X
  • Objective Lens Diameter - 24mm
  • Eye Relief - 2.75"
  • Mount Type - QD (non 30mm ring)
  • Angular FOV - 6.25 deg
  • Linear FOV - 37ft @ 100 yrds
  • Length - 3.9"
  • Waterproof - IPX67
  • Weight - 11.6 oz


holosun hm3x packaging

Holosun ships the HM3X in a very nice packaging just like all other Holosun products.

holosun hm3x unpacking
  • Holosun HM3X magnifier (QD Mount included)
  • 2 Riser plates
  • 2 tall screws for riser plate
  • 2 short screws 
  • Diopter lens cap
  • Manual

Initial Impression

holosun hm3x front lens
holosun hm3x magnifier

This thing is just rock solid. I don't think there is any other high quality 4X red dot magnifier at this price range.

The spring tension on the side flip is sturdy and tight to go on any carbine top rail.

holosun hm3x on x95

The package comes with just 1 riser plate for raising the scope height up to 1/3 co witness but not enough for tall height red dots.

Main Applications

Mid - Long Range

This red dot magnifier scope improves target ID and finer dot aiming placement especially when using a 1 MOA dot. 

Shooters with astigmatic eye can finally see a much clearer dot (as long as the diopter ring is properly adjusted)


holosun hm3x magnifier with aimpoint micro h1

Just tuck the 4X magnifier to the side and resume to 1X red dot.

Finer Zeroing Process

36 yard zero

Finer red dot zero when your reticle is magnified for a better view

Magnification & Glass Quality

The glass quality is superb. If the red dot sight has tint, then the shooter will see the tint through the glass. If not, then it will be very clear.

Before any magnifier glass review, we always dial the diopter ring first to focus the image relative to the shooter's eyesight. It's an important step to do.

holosun hm3x rear lens

The diopter is hidden under the lens cover cap. Just remove it and get access to the ring dial.

sig Juliet 4X POV

~ 724 ft (241 yard)

The 4X magnification is not much different than a 3X magnifier, and it's is a great tool for positive target identification during the day and night. 

As long as the diopter ring is adjusted relative to the shooter's eye sight, it's good to go!

holosun hm3x magnifier

Lens tint comes from the Aimpoint Micro, please don't be misled by this picture

holosun hm3x with leupold lco pov

Leupold LCO has no lens tint

Eye Relief

The eye relief distance is very good. Anytime when bring the optic to the eye, it doesn't have anything that bothers the shooter as long as the optic height is adjusted.

Move a bit back, or move a bit forward will not induce too much scope shadow.

What we like the most is its slim outer body that doesn't obscure the view.

However, the shooter still needs to place the eye inside the eye box, and keep centered as much as possible. Otherwise the scope shadow will occur.

Overall Build Quality

The construction feels very solid. The mounting extrusion and the body is one piece.

holosun hm3x and trijicon rmr
holosun hm3x magnifier on cz evo
holosun hm3x qd lever open
holosun hm3x and eotech exps3 fde
eotech exps3 with holosun hm3x magnifier
holosun hm3x magnifier with eotech exps3 tucked away

Magnifier tucked to the right

eotech exps3 with holosun hm3x tucked to the left

Magnifier tucked to the left. Just reverse mount the optic. 

Note: The QD lever will be on the opposite side

The overall size is longer than these popular Vortex Micro 3X magnifiers on the market.

It will be interesting to see when Holosun will release a much more compact 3X model for anyone looking for a compact design.

QD Throw Lever Mount

Very Rock Solid ! No Compliant

holosun hm3x magnifier mounting footprint
holosun hm3x riser plate
holosun hm3x magnifier riser and qd mount
holosun hm3x magnifier qd mount recoil lugs

The QD throw lever has a locking mechanism to prevent the lever from letting loose.

The user can also tighten the screw to add tension to the QD lever if it's loose.

The throw lever also doesn't stick out compared to those American Defense alike throw lever that come with Vortex Micro 3X and other optics, so it should not interfere with top receiver charging handle finger grip.

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Final Verdict


  • Very rock solid 3X magnifier from Holosun
  • Great glass clarity
  • Non obscuring POV lens body
  • Mount risers included


  • Aesthetics can be improved (Subjective to personal preferences)
  • Taller riser plates are not included for red dot placed at 1.93" height
  • Doesn't work with those bad ass Unity Tactical FTC G33 magnifier mount)

See other similar 3X magnifiers: Vortex Micro 3X