Inspired by MIL-SPEC Romeo-M17; Establishes 5 total points of contact to create the strongest lockup in the industry; Longer focal length to dramatically reduce parallax and create an ultra-crisp reticle; Rugged 7075 aluminum housing with a fully enclosed and sealed optical system; Distortion-free aspherical glass lens; MOTAC (Motion Activated Illumination); Industry's lowest deck height for standard-height iron sight co-witness; 15 illumination settings including 3 dedicated night vision; 20 000 hours battery life with side load battery; Assembled in USA