The Armasight MCS (Miniature Collimating Sight) is a micro LED collimating sight for both-eyes open rapid target acquisition. The MCS is rugged, lightweight and designed to mount onto many existing optics as well as MIL-STD=1913 Picatinny and Weaver-style rails. The Armasight 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 20 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 be overridden by the user to maximum brightness mode if so required). The MCS is designed to signifficantly 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 Armasight MCS features 1.2 MOA/click windage and 1.5 MOA/click adjustments. A unique optical design allows for parallax-free always on the center reticle. Waterproof; tested against salt fog, dust, vibration, drop-tested, and fired on a variety of firearms for thousands of rounds, the Armasight MCS complies with MIL-STD 810 G standard. The MCS features a unique pivot lens cover with anti-reflu001dective coating and works on a single, easy to replace CR2032 3V battery. Features: Tactile click stops for windage & elevation adjustments A switchable 3.5 MOA dot to 20 MOA ring reticle pattern Automatic brightness control of the reticle based on the target area brightness.