Chosen by elite government and military agencies, the ROMEO4S is the ultimate red-dot sight when fact, accurate target acquisition is a must. Regardless of lighting conditions, weather conditions, or terraint. Whether it's a moving target, dangerous game at full charge, or a fast-breaking tactical situation at close quarters, the rugged ROMEO4S Red-Dot sight can handle the job. User selectable reticles (1 MOA Plex, Plex with Holds, Circle-Plex, Circle-Plex with Holds) Runtime in exess of 100,000 hours with solar and battery usage True Co-Witness QR mount and low mount included waterproof and fogproof Strong and lightweight aircraft grade CNC aluminum ho Mfg: Sig Sauer, Inc.