Meprolight M21 Reflex Sight | 4.3 MOA Bullseye | 30 mm

The Meprolight M21 is a self-illuminated reflex sight engineered for quick, instinctive aiming in all lighting conditions. Illumination is supplied by a fiber-optic collector by day and a miniature tritium source by night, giving continuous day/night capability without batteries. The sight features a large 30 mm display window and a 4.3 MOA bullseye dot for fast target acquisition with both eyes open. It is designed to be weather resistant and to provide reliable operation across a range of field conditions.

Product Specifications

• The product model is M-21.
• The reticle is a 4.3 MOA Dot Bullseye Reticle.
• The dot size is 4.3 MOA.
• The magnification is 1x.
• The objective lens measures 30 mm.
• The overall length is 4.48 inches.
• The weight is 13.12 oz.
• Windage and elevation are adjustable.
• The field of view is listed as Unlimited.
• The eye relief is listed as Unlimited.
• The finish color is Black.
• The sight is weather resistant.
• The product type is Reflex.
• The power is 1X.
• The UPC is 879015002787.

Well-suited for close-quarters applications and duty/range use, the M21 emphasizes fast acquisition and simple, maintenance-free illumination. Its large optical window and intuitive bullseye reticle make it useful as a primary non-magnified sight or as a co-witnessed reflex option behind magnified optics. The design prioritizes consistent, no-battery operation and durable performance under varied environmental conditions.

Owners frequently praise its maintenance-free day/night illumination and the rapid target acquisition it enables with both eyes open.

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