The Meprolight M21 (MPN MEPL 0626210) traces its roots to a sight originally developed for the Israel Defense Force, using dual tritium/fiber-optic illumination so it never needs a battery to stay lit.

Key Specifications

• Magnification: 1x
• Dot Size: 4.3 MOA
• Reticle: 4.3 MOA Red Dot
• Lens Diameter: 30mm
• Length: 4.48 in.
• Eye Relief: Unlimited
• Illumination: Dual tritium/fiber-optic, self-powered
• Model: M21
• Manufacturer: Meprolight

Frequently Asked Questions

Does the M21 need batteries?

No, it uses dual illumination from tritium and fiber optics, so it stays lit day and night without a battery.

Can the M21 be used with a magnifier?

Yes, it’s designed to work with magnifiers such as the Mepro MX3F/T without a noticeable drop in field of view.

Is the M21 compatible with night vision?

Yes, it’s built for use with night vision goggles and scopes, including GEN III tube systems.

Buy the Meprolight M21 1x30mm Red Dot Sight, 4.3 MOA, Black

See the Meprolight M21 4.3 MOA and other reflex sights from Meprolight, or browse our full red dot sights selection.