Meprolight USA M21 Black 1x30mm Red Triangle Illuminated Reticle. Dual illuminated 1X Red-Dot reflex sight. Large 30mm diameter lens with Red Triangle Post. Large field of view for rapid target acquisition. The MEPRO M21 is suitable for Night Vision Goggles or scopes including those with GEN III tubes and magnifying scopes such as the Mepro MX3F/T. Easy positioning of Magnifier close to the sights optics with no decrease in the field-of-view and without compromising convenient switch operation. Specifications for Meprolight M22 1x30mm Bullseye Reflex Red Dot Sight: Manufacturer: Meprolight Color: Black Magnification: 1 x Objective Lens Diameter: 28 mm Illumination Color: Red Eye Relief: 10 - 600 mm Emitter Type: Open Weight: 0.58 lb Condition: New Red Dot Sights-Footprint: Not Applicable Dimensions: 3.8 x 3.2 x 2.7 in Package Contents: Meprolight M22 1x30mm Bullseye Reflex Red Dot Sight Meprolight 56225000: USA 56225000 M21 Black 1x30mm Red Triangle Illuminated Reticle