Unique features for CompM4 Compatible with every generation of NVD Comes with NVC Mount New technology called ACET allows 50,000 hours of operation on one single battery (on setting 7 out of 10) 500,000 hours of use on NVD setting Unequalled light transmission Available in 2 dot sizes (2 and 4 MOA) Submersible to 45 meters (135 feet) Standard features for all Aimpoint sights Unlimited field of view Parallax-free with unlimited eye relief Unaffected by extreme weather conditions Rugged, – durable construction No hazardous materials used No radioactive components No laser emission that could be harmful to yourthe eyes Mechanical switch for speed and reliability Increased aiming confidence Reduced training time and lees ammunition expended