Meprolight M21-B Day/Night Reflex Sight | 1x 30mm | MFG# 0626610

The Meprolight M21-B is a self-illuminated day/night reflex sight built around a 30mm objective and an Open X reticle for rapid, intuitive aiming at close to intermediate ranges. The sight provides a true 1x view with unlimited eye relief and is constructed to resist weather in field conditions. Windage and elevation are user-adjustable, and the unit is finished in black for low-profile mounting.

Product Specifications

• The magnification is 1x for head-up, both-eyes-open target acquisition.
• The objective diameter is 30mm to balance sight window and compactness.
• The reticle type is an Open X for clear reference without obscuring the target.
• The sight is rated Weather Resistant for reliable operation in adverse conditions.
• The weight is 13.12 oz for a lightweight mounting option.
• The overall length is 4.48 inches for compact installation on a rail-equipped platform.
• The finish is Black for a low-visibility profile.
• The windage and elevation are Adjustable to zero the sight to the host platform.
• The dot size is listed as Optional per manufacturer configuration options.
• The eye relief is listed as Unlimited allowing flexible head position while aiming.
• The field of view is listed as Unlimited consistent with a 1x open reflex design.
• The unit comes with a dust cover and self-illumination for day/night use as a Day/Night reflex sight.
• The UPC is 879015004378.

The Meprolight M21-B blends a simple, high-visibility Open X reticle with durable, weather-resistant construction to serve shooters who need a dependable reflex sight for competitive target work and professional field use. Its true 1x viewing, compact footprint, and user-adjustable controls make it a practical choice when fast, unobstructed sighting is required.

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