Mepro M21 Red Dot Self-Powered Day/Night Reflex Sight Bullseye

Save $50.00
MeprolightSKU: ML62621
3 reviews

Reticle: 4.3 MOA
Sale price$429.99 Regular price$479.99


The MEPROLIGHT MEPRO M21 is an innovative, self-illuminated reflex sight, designed to provide unmatched tactical superiority. Originating from the Israeli Defense Force, this red dot sight is a result of advanced Meprolight® tritium technology, employed globally by militaries and law enforcement agencies.

The M21 is powered by fiber optics during the day and Meprolight® tritium at night, offering all-light aiming without the need for batteries. This seamless transition between systems ensures high contrast between the aiming dot and the target area, enabling optimal visibility in all light conditions. Its tritium luminance is warranted for ten years.

The sight boasts a wide 30mm diameter lens, providing a large field of view for rapid target acquisition. Its versatility is further enhanced with five different reticles – MOA or 5.5 MOA dot, Triangle, 4.3 Bullseye, and X – increasing your accuracy and speed under pressure.

Engineered to withstand harsh conditions, it meets rigorous MIL-STD-810 standards, proving its reliability in extreme weather conditions. Compatibility with Night Vision Goggles or scopes, including those with GEN III tubes and magnifying scopes such as the Mepro MX3F/T, adds to its functionality.

With no need for batteries or switches, the MEPRO M21 is always ready, making it a dependable choice for those in demanding tactical scenarios.

Meprolight Mepro M21 Features:

  • DUAL ILLUMINATION SYSTEM: This sight takes advantage of ambient light during daylight using fiber-optics, and Tritium, a self-illuminating material, in low light or nighttime. The transition between the two systems is automatic and instantaneous, ensuring a clear and bright aiming dot in all lighting conditions.
  • VARIETY OF RETICLES: Mepro M21 offers a selection of five different amber-colored reticles. You can choose between an MOA or 5.5 MOA dot, Triangle, 4.3 Bullseye, and X. These various options adapt to different tactical scenarios and enhance your shooting precision and speed.
  • RUGGED AND ROBUST CONSTRUCTION: Crafted to meet the rigorous MIL-STD-810 standards, the Meprolight M21 sight exhibits impeccable performance in extreme weather conditions. This rugged, reliable design ensures durability and longevity, whether you're in a battlefield or a shooting range.
  • NVG COMPATIBILITY: The Meprolight Mempro M21 sight is designed to be compatible with Night Vision Goggles and scopes, including those fitted with GEN III tubes and magnifying scopes like the Mepro MX3F/T. This compatibility ensures that your visibility and targeting accuracy remain uncompromised, even in low light conditions.
  • LARGE FIELD OF VIEW: The sight features a large 30mm diameter lens, offering a wide field of view. This extensive view ensures rapid target acquisition, enhancing your accuracy and speed when firing under pressure. It increases your situational awareness, giving you an edge in tactical scenarios.
  • BATTERY-FREE OPERATION: The M21 Red Dot is maintenance-free and doesn't require batteries to operate. It's always on and always ready, providing you with a hassle-free user experience and continuous performance, which is especially crucial in demanding tactical environments.
  • LONG-LASTING LUMINANCE: The tritium luminance of the sight is warranted for ten years. This feature guarantees a bright and clear reticle, ensuring optimal visibility and accurate targeting in low-light and nighttime situations for a decade.
  • MILITARY AND LAW ENFORCEMENT APPROVED: Tested and trusted by the Israeli Defense Forces and law enforcement agencies worldwide, the M21 Red Dot sight proves its reliability and effectiveness in real-world tactical situations. It's your companion for precision, speed, and accuracy in the most challenging conditions.

Meprolight Mepro M21 Technical Specifications:

Attachment/Mount Type: Picatinny
Condition: New
Included Accessories: Dust Cover
Magnification: 1 x
Objective Lens Diameter: 30 mm
Length: 114 mm, 4.48 in
Weight: 372 grain
Eye Relief: Range 10 - 600 mm
Tube Diameter: 1.17 in
Weather Resistance: Yes
Color: Black
Water Resistant Mark: 1 m
Objective Aperture: 27 mm
Illumination Type: Tritium, Fiber Optics
Height: 70 mm, 2.73 in
Width: 2.22 in, 55 mm
Parallax: 0.25
W/E Travel at 100 Yds: +/- 35 MOA
Adjustment Click Value: 1.7 MOA
Lens Material: Optical Glass
Lens Finish: Polished
Fabric/Material: Metal
Operating Temperature: Range -40 - 131 Fahrenheit
Optical Coating: AR Coating
Light Transmission: 50 %
Water Resistance Level: Waterproof
Illumination Color: Red

No batteries. No weakness. No surrender.

Self-illuminated and battle-proven reflex sight.

Originally developed for the Israel Defense Force (IDF), the Mepro M21 Red Dot Day/Night Self-Illuminated Reflex Sight represents the best of Meprolight® tritium technology and remains on active duty for the IDF and militaries and law enforcement worldwide.

A red dot sight with fiber-optic illumination by day, Meprolight® tritium by night, it takes charge of any field of battle with no need for batteries, ever. Its rugged, battle-proven construction meets or exceeds rigorous MIL-STD-810 standards to thrive in the harshest conditions, with five available reticles and a big 30-millimeter lens for maximum situational awareness.

Customer Questions & Answers

Will this work on 45 colt long rifle?

  • If your rifle has a flattop upper receiver with an M1913 picatinny rail. If not, then you'll have to mount the optic over the hand guard with some different hardware.

Would this handle recoil from a 12g ok?

  • It probably would but it is really not designed for use with a shotgun.

I live in a dark area w/ few lights. With the Night Reflex part of the sight; how well do you see in complete darkness, full moon & suburbs w/ lights?

  • The dot will show in almost total darkness but unfortunately your target will not. But the m21 is awesome when paired with a night vision scope like a PVS-14. The dot is bright but not too bright and needs no special setting for night vision like some other red dots.

How long does the tritium last and is it replaceable? If so, how much does that cost?

  • Mepro claims 12 years but in my experience you can expect 9 to 10 years of life from the tritium vial. Yes, you can send it in to Mepro for replacement. I can't tell you how much it costs or what turnaround time is though.
    If you buy this optic get the 4.3 MOA dot. Don't get any of the other reticles. They are too big.

Customer Reviews

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