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// 29.9.2023 GA4 add to cart // 29.9.2023 GA4 add to cart

Meprolight Mepro M21

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Meprolight Mepro M21 Details

  • Meprolight Mepro M21 is a battle-proven red dot sight, tested in the harshest conditions imaginable.
  • It doesn’t work on a battery but is powered by a fibre optic collector system during the day and by tritium at night – when all other sights fail, M21 will continue to work.
  • With a QD-detachable mount, you will be able to mount and dismount this sight from the Picatinny platform in a matter of seconds.
  • it can be paired with night vision goggles and scopes which greatly increases its usability.

Meprolight is an Israeli company, founded in 1990. They offer includes day optical devices, night vision devices, thermal imaging devices, self-illuminated night sights, etc. Their products have been tested to withstand the harshest conditions imaginable, which is why they are popular with the military and law enforcement. The company complies with NATO and US military specifications as well as International MIL Standards.

Meprolight red dot sights

Meprolight’s red dot sights are designed for rough use. They manufacture open reflex red dot sights which are compact, small and rugged, but they also provide more robust solutions for AR-platforms, namely the Mepro M5 and Mepro M21. All their red dot sights are rigorously tested before they are dispatched from the factory.

About the product (Meprolight Mepro M21)

Mepro M21 is often referred to as the most durable red dot sight in the world. It was designed through close collaboration with Israeli special forces. When all other red dot sights fail, this robust device will continue to work. It is not powered by the battery. Instead, it works with the help of a fibre optic collector system during the day and a miniature self-powered tritium light source at night – it is always ready for action. The transition between the systems is instantaneous and automatic, providing an all-light aiming capability. Meprolight M21 is designed for an AR platform and meant to be used at close quarters. It can be paired with night vision goggles or scopes.

The device operates at 1x magnification, allowing for a rapid target acquisition with both eyes open. It is of the open reflex type but much bigger than most sights in this category. Blue tint can be seen when looking through the lens.

This 1x30mm reflex sight comes with a quick-detachable mount for a Picatinny platform. It can be zeroed with the help of elevation and windage turrets which are flush with the housing. Each click provides 1.7 MOA (0.5 MIL) of movement. The clicks are crisp and audible.

There are several models available, the only difference being in the reticle: 0.3 MOA Triangle, 4.3 MOA dot, 5.5 MOA dot, 2.2 MOA Bullseye, and Open X.

It comes with a neoprene cover, a brush and a lens cloth. It is made in Israel.

  • Extremely durable and robust
  • Works without a battery
  • QD-mount for Picatinny platform
  • Can be paired with night vision
  • Open reflex type
  • Several reticles to choose from
  • Made in Israel
  • 1 year of warranty on the material, 10 years on the illumination


The product comes with 1 year of warranty on the housing and 10 years of warranty on the illumination. You can read more about the warranty policy here.

Meprolight Mepro M21 Specifications

Dot sight seriesMeprolight Mepro
Made inIsrael
In production sinceNo
Warranty2 years
Click Value 28mm/100m - 1MOA
Windage - mrad. 46.434mrad
Windage - MOA.145MOA
Reticle position No
Reticle illumination Yes
Illumination color Red
Usable at daytime Yes
Automatic Turn Off No
Size of Dot.2.2651MOA
Adju. intensityNo
Intensity controlNo
Parallax setting Parallax free
Length.114 mm
Width.0 mm
Height.0 mm
Working temperature range-40 °C / 60 °C
Power Supply UnitNo
Battery lifespan.0h
Filled with -
Lens coatings Fully Multicoated
Mounting StandardPicatinny (Integrated)
Mount type - IntegratedPicatinny
Mount length.129.1082mm
Size of windowNo
Dot Sight TypeReflex sight
Water proof Yes
Fogproof Yes
Shock proofNo
Type of mount rail N/A


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Reviews & Testimonials

Reviews for Meprolight Mepro M21

2 reviews
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works without a battery By
I bought this dot since it works without the battery. It is not the best dot I have seen, however it is the only one I know that works without a battery.

Optics Trade was the only shop in EU where I found this dot and their service was excellent.

(Posted on 15/04/2018)

Robust as it gets By
This is the most robust red dot I own. The image has a bluish tint, however I have this dot to be robust and to work without a battery. I am saving it for the dark hours - if needed! It is build as a tank :)

(Posted on 15/04/2018)

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