The Trijicon MRO SD is a sealed miniature reflex sight designed for rifles, carbines, and shotguns to deliver fast target acquisition, with a large aperture and tapered light path that maximize viewing area for improved situational awareness and rapid engagement. This red dot sight incorporates ambidextrous brightness controls, sub-flush adjusters, advanced lens coatings, and a fully sealed waterproof forged 7075-T6 housing finished in Coyote Brown, making it a rugged choice for demanding environments. A re-engineered objective lens enhances optical performance and maintains magnifier compatibility, while improved windage and elevation adjusters sustain strict zero retention under drop and recoil. The MRO SD features a 1x magnification with a 25mm objective, a 2.0 MOA red dot reticle, eight illumination settings powered by a single CR2032 battery, and an LED illumination source for reliable daytime and nighttime visibility. Dimensions measure 2.9 inches in length, 1.7 inches in width, and 2.1 inches in height, with a weight of 4.8 ounces, and it mounts on a lower 1/3 co-witness Picatinny rail for versatile sighting options.