The Armasight MCS (Miniatur Collimating Sight) is a passive targeting micro LED collimating sight for "both-eyes open" rapid target acquisition. The MCS is rugged, lightweight and designed to mount onto a variety of existing magnified day optics as well as MIL-STD=1913 Picatinny and Weaver-style rails. The MCS is the only sight on the market in its class that features a dual reticle pattern. The user can select a 3.5 MOA "Dot" reticle or 30 MOA "Ring" reticle pattern, depending on mission requirements. The MCS is compatible with night vision devices of all generations. Reticle intensity is regulated by an automatic brightness control sensor which can also be overridden by the user to adjust the brightness mode as required. The MCS is designed to singnificantly improve accuracy and efficiency of virtually any weapon, from handguns and pistols to assault rifles and light machine guns. The compact size and versatility of the MCS makes it an ideal secondary/backup optical sight. Accurate and reliable, the MCS features 1.2 MOA/Click wincdage and 1.5 MOA/click adjustmets. A unique optical design allows for a parallax-free, "always on the center" reticle. Waterproof and tested against salt fog, dust, vibration, significant drops, and fired from a variety of firearms for thousands of rounds, the MCS complies with MIL-STD 810G requirements. The MCS features a unique pivot lens cover with anti-reflective coating, and works on a single, easy to replace CR2032 3V battery.