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Meprolight M21 Triangle Day/Night Tritium Illum Reflex Sight w/Picatinny Rail Adapter 0626410

SKU 0626410-MPL

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Mepro takes red dot sights to the next level with the M21! This advanced sight was developed for the IDF, and is highly suited for close-quarters or in situations where the use of both eyes is critical. The M21 functions without batteries, and provides illumination with a system of fiber optics and tritium. The fiber optic collectors on the top and front of the sight illuminate the reticle in daylight conditions, while the self-powered tritium illuminates the reticle in the dark. Transition between the two illumination systems is seamless, and is always available without any switches or external sources of power. In addition, the M21 is available in the following reticles: Bullseye, Triangle, Open X, or a dot reticle in either 4.3 MOA or 5.5 MOA.

Features of the M21 Red Dot Sight:

  • Functions without batteries
  • Self-illuminated via system of fiber optic collectors and tritium
  • Available reticles: Bullseye, Triangle, Open X, or a dot reticle in either 4.3 MOA or 5.5 MOA.
  • No switches or external sources of power


  • Magnification Range:1x
  • Reticle Details5.5 MOA dot
  • Dimensions:4.48" x 2.16" x 2.75"
  • Weight:13.12 ounces
  • BatteryN/A (tritium and fiber optics)
  • Battery TypeTritium & Fiber Optics
  • Night Vision CompatibleYes
  • Brightness SettingsFixed
  • Product TypeReflex Sight/Red Dot
  • Item ConditionNew
  • UPC879015004361
  • MPN0626410

Customer Reviews

Average Rating
September 17, 2023

Was very pleased with this optic. The reticle is usable both inside and out. Seems very durable as well.

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