ATN's ELCAN SpectorOS is designed for law enforcement, military and security applications and incorporates an illuminated reticle with a rangefinder and ATN's Rapid Aiming Feature. This combination of sighting systems offers rapid engagement in CQB situations while providing precise aiming at distant targets. Built to withstand the severe conditions of combat operations, the optional MIL-STD-1913 auxiliary mounting rails enable flexible mounting solutions for other accessories. The night vision system can be supplied with either a ballistically-calibrated reticle or calibrated external elevation and windage adjustments. The ELCAN can be mounted directly to flat top receivers or M16/AR15 handles.