The Sig Sauer ROMEO5 1x20mm Red Dot Sight is a robust, compact red dot sight with 1x aiming solution optimized for today's MSR rifles, shotguns, carbines, submachine guns, and full-sized handguns. It features a 2 MOA Red Dot with 10 illumination settings (8 daylight plus 2 NV) for visibility in all light conditions. It also comes equipped with MOTAC (Motion Activated Illumination) that powers up when it senses motion and powers down when it does not. Provides for optimum operational safety and enhanced 40,000+ hour battery life. It has an integrated M1913 Picatinny interface mount that provides industry-standard mounting options for a wide range of applications. This red dot from Sig Sauer is a dependable waterproof (IPX-7 rated for complete water immersion up to 1 meter) and fog-proof optic. It includes a M1913 Picatinny low mount riser and a co-witness 1.41” riser mount in the box.