The Aimpoint CompM4 Red Dot sight is lightweight, versatile and a great addition to your rifle set up. The proven design of CompM4 is soldier-tested and has been used as the standard infantryman’s sight for many NATO military forces including the US. The lenses on this optic offer immense light transmission for a crystal-clear sight picture and the front of the optic is threaded of the use of an anti-reflective device. The CompM4 uses a single AA battery which lasts up to 8 years of continuous use. The highly visible 2 MOA dot has 9 daylight setting, 7 night vision settings, and is compatible with every generation of night vision device.Features of the CompM4s:7 NVD settings, 9 daylight settings Compatible with every generation of night vision device Waterproof 2 MOA Dot Reticle Uses common AA battery, lasts up to 8 yearsImpact resistant adjustment caps