The green or amber dot is powered by fiber optics that naturally adjusts for brightness during daylight hours, and the dot is illuminated by Tritium—like handgun night sights—in low light ...

Many shooters prefer three-dot, all black, or express style sights, and tritium night sights are popular too. There are sights available that you can co-witness through an optic or see over top of a ...

The M150 is an Advanced Combat Optical Gun sight (ACOG) designed for the US ... using a combination of fiber optics and self- luminous tritium. This allows the aiming point to always be ...