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Questions & Answers
Will this work with an m21?

Yes, this magnifier comes factory at a 1.5" height and has a 1.93" adapter. It is compatible with any of our rifle optics.

by Noah, Verified Owner, November 20, 2024
Will this cowitness with there 1.93 height tru vision red dot?

Yes, both the MMX4 and MMX3 come from the factory at a 1.5" height, but have an included riser that will bring them up to 1.93".

by NoahL, Verified Owner, December 18, 2024
Customer Reviews
Helpful Positive Review
Very efficient magnifier by Kroilman, Verified Owner, April 18, 2025
Super clear glass and mounted perfectly to my new friend. Lightweight and sweet skin, exactly what I wanted.
1/2 found this helpful
Helpful Positive Review
Solid optic by Chris, Verified Owner, November 16, 2024
Well built, clear glass, great price on here. Can’t go wrong with this one at this price.
3/5 found this helpful
Helpful Positive Review
Tough Eye Relief by PShep, Verified Owner, June 29, 2025
Optics are clear and clean, magnification level of 4x is great and focus ring is perfect. My only draw back to this item is the difficulty with eye relief. Hoping it gets easier as I get used to it, but the first two uses have been a challenge
2/2 found this helpful
Helpful Negative Review
Good glass, bad mount. Overpriced. by SS, Verified Owner, November 17, 2024
The claim that it will co-witness with 1.4" height iron sights is false! The lowest the mount will go is 1/3 lower co-witness. The glass quality & clarity is good, though. It's too bad the mount was not well designed. Overall, this is way overpri...
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5/9 found this helpful
Most Recent Reviews
Quality product, but... by Mark in Italy, Verified Owner, April 25, 2026
I have a S&W M&P-15 with an Meprolight M21 sight. When the M21 is installed fully forward on the top rail, if you try to install the MMX4, the rail isn't long enough for both. The only way to get it to work is to get an extended riser, that is long e...
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Most Recent Reviews
Reccommend but caution by Dave, Verified Owner, October 24, 2025
I gotta say, size and weight on par with all micro magnifiers, 4x is perfect. The box/ packaging is nice, has a black rubber cover and a tan rubber cover all the tools needed to adjust, extra plate to adjust height and longer screws. Diopter rear adj...
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Read All 8 Reviews
Blazin' Deal
Free Gift w/ Purchase of Select Meprolight Optics

Save 17.76% on Select Meprolight Products

Blazin' Deal
Prices have been cut drastically on this product as part of a special offer. These prices are so low that there's no double-dipping with coupons or any additional discounts, but you'll still get the best deal out there. This offer won't last long, so don't miss out!
Included Accessories:
w/ Quick Flip
Height:
1.4 in, 36 mm
Color:
Black
Condition:
New

Code: MR-RDM-4XMM-8016000200

MPN: 8016000200

UPC: 0810013524109

Blazin' DealMeprolight Suppressor Rebate Card
List: $474.99Save 26%
$353.62

  • Meprolight MMX4 4x24mm Micro Magnifier w/ Quick Flip, QD Picatinny, Black, 3.2x1.4x1.74 inch, 8016000200, 8016000200
  • Meprolight Suppressor Rebate Card, REBATE PROMO CARD, REBATE PROMO CARD
As low as $353.62
You Save Up to 47%

Product Info for Meprolight MMX4 4x24mm Micro Magnifier w/ Quick Flip, QD Picatinny

The Mepro MMX4 micro magnifier is compact, lightweight magnifier that will extend your effective range of your red dot or 1x reflex sight. Weighing in at 6.9 it reduce the footprint, saving rail space and weight on your firearm.image

Elevation and windage dials provide precise FOV line of sight alignment. A wide FOV enables rapid target acquisition with both eyes open which is ideal where agility, and speed are of the utmost importance.

The Mepro MMX4 micro magnifier attach to any MIL-STD-1913 rail directly behind your optic.

When not in use the Mepro MMX4 can be flipped out of the way by depressing a pushbutton.

Specifications for Meprolight MMX4 4x24mm Micro Magnifier w/ Quick Flip, QD Picatinny:

Manufacturer: Meprolight
Finish: Ruber
Magnification: 4 x
Objective Lens Diameter: 24 mm
Eye Relief: 2.89 in, 73.4 mm
Length: 3.2 in, 82 mm
Weight: 10.01 oz, 284 g
Field of View, Angle: 5.5 degrees
Included Accessories: w/ Quick Flip
Height: 36 mm, 1.4 in
Color: Black
Operating Temperature: -4 - 122 Fahrenheit
Exit Pupil: 6 mm
Diopter Adjustment Range: -2.5 - 2.5 dpt
Condition: New
Water Resistance Level: IPX-7
Size: One Size
Age Group: Adults
Gender: Unisex
Mount Type: Picatinny
Gun Rail: Picatinny

Features of Meprolight MMX4 4x24mm Micro Magnifier w/ Quick Flip, QD Picatinny

  • Side-Flip
  • High Transparency Optics
  • Highly Durable Structure
  • No Batteries Needed
  • Two Rubber Covers

Package Contents:

  • Meprolight MMX4 4x24mm Micro Magnifier w/ Quick Flip, QD Picatinny

Meprolight MMX4 4x24mm Micro Magnifier w/ Quick Flip, QD Picatinny Orderable Models

List of Orderable Models

  • Meprolight MMX4 4x24mm Micro Magnifier w/ Quick Flip, QD Picatinny, Black, 3.2x1.4x1.74 inch, 8016000200, 8016000200 , MPN: 8016000200 , UPC: 0810013524109 , Code: MR-RDM-4XMM-8016000200

Meprolight MMX4 4x24mm Micro Magnifier w/ Quick Flip, QD Picatinny Unavailable & Discontinued Models

List of Unorderable Models

  • USED, Meprolight MMX4 4x24mm Micro Magnifier w/ Quick Flip, QD Picatinny, Black, 3.2x1.4x1.74 inch, 8016000200, 8016000200 , MPN: 8016000200-EDEMO , Code: MR-RDM-4XMM-8016000200-EDEMO-IN-C
  • USED, Meprolight MMX4 4x24mm Micro Magnifier w/ Quick Flip, QD Picatinny, Black, 3.2x1.4x1.74 inch, 8016000200, 8016000200 , MPN: 8016000200-EDEMO , Code: MR-RDM-4XMM-8016000200-EDEMO-IN-D
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Last updated 2026-06-15 UTC.