Sig Romeo 4M Red Dot Sight 1x20mm Circle Dot Reticle Low Profile & Lower 1/3 Cowitness Mount, Graphite Finish

Compact closed red dot sight with M1913 rail interface. Low Dispersion LD glass lens design with high performance coatings. 2 MOA red dot. Battery conserving motion sensor for automatic on/off. Manual brightness controls are easy-to-reach. 0.5 MOA adjustments. Waterproof and fogproof performance. Operates on CR2032 battery. Graphite finish.