Description
The Holosun HM3X 3X Magnifier sits behind a red dot and turns a 1x sight into a 3x optic for identifying and engaging targets farther out. When you do not need it, the quick-release mount swings it out of the way so you are back to a 1x view in a second.
Holosun HM3X 3X Magnifier Overview
The HM3X is an aluminum-bodied magnifier measuring 4 by 1.7 by 2.5 inches and weighing 9.8 ounces with its mount. It offers 2.75 inches of eye relief, a 7 degree field of view and a 7.6mm exit pupil. A diopter adjusts plus or minus 3 so the reticle stays sharp for your eyes, and the housing is nitrogen purged to resist internal fogging. Internal centering adjustments let you line the magnified view up with your red dot.
How a Magnifier Works With Your Dot
A magnifier does not change your zero. It simply enlarges the image and the dot together, so a 2 MOA dot looks larger relative to the target but stays on the same point of impact. That makes it easy to confirm what you are aiming at past 100 yards. Expect the dot to look less crisp under magnification, especially with astigmatism, and a 65 MOA circle will cover a lot of target at 3x.
Flip-to-Side Mount
The ambidextrous quick-release mount swings the magnifier left or right and out of your sight line. That lets you keep a fast 1x setup for close work and swing the 3x back in for longer shots. The lever clamps to any Picatinny rail, and the flip motion is quick enough to do mid-string with practice. Check that the flip direction does not interfere with your charging handle or ejection port.
Height Options
The HM3X ships at absolute co-witness height and includes a spacer to raise it for lower 1/3 co-witness red dots. Match the magnifier height to your dot so the optical centers line up. Holosun’s own dots such as the 515 series, the ARO and the AEMS line pair cleanly, as do most Aimpoint and Sig micro dots at the same heights.
Toughness and Weather
The aluminum housing is anodized black and rated IP67 for submersion, and the nitrogen purge helps prevent internal fogging when moving from cold to warm air. Holosun rates it for 1000G vibration, which covers recoil from 5.56, .308 and 12 gauge without complaint. Keep the lens covers on in the field; rain on the eyepiece will blur the view.
Is 3X Right for You
A 3x magnifier is the classic choice for AR-15s: enough to identify targets at 200 to 300 yards without making the setup unwieldy. If you shoot mostly inside 100 yards, you may not need one. If you want more reach, a 5x or 6x unit gives more detail at the cost of a narrower field of view, more weight and pickier eye placement.
Ordering and Transfer
When you order a firearm from MAG5 Firearms, we ship it to the licensed dealer you choose. Your dealer completes the ATF Form 4473 and the background check, and may charge a transfer fee. Local buyers can complete the transfer at our shop. Bring a valid ID, and check your state waiting period before you plan a hunt or a range trip.
Specifications
- Model: HM3X
- UPC: 605930625271
- Magnification: 3x
- Eye relief: 2.75 in (70mm)
- Field of view: 7 degrees
- Exit pupil: 7.6mm
- Diopter: plus or minus 3
- Housing: aluminum, black, nitrogen purged
- Water rating: rated for submersion
- Dimensions: 4 x 1.7 x 2.5 in
- Weight: 9.8 oz
- Mount: flip-to-side QD, absolute height with lower 1/3 spacer included
Before You Buy
Magnifiers are optics, not firearms, so no FFL transfer is needed and this ships straight to you. Make sure your rail has space behind your red dot, and match the magnifier height to your dot height before ordering.
Who It Is For
The Holosun HM3X 3X Magnifier is a great fit for AR-15 owners running a red dot who want the ability to see and engage targets at 200 yards and beyond without giving up a fast 1x setup.
Buy the Holosun HM3X 3X Magnifier at MAG5 Firearms
MAG5 Firearms is a family-owned shop in Collegeville, Pennsylvania. Optics do not require an FFL transfer, so the Holosun HM3X 3X Magnifier ships straight to your door. Browse our full selection of red dot sights for more red dots and magnifiers. For factory details, visit Holosun.
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