Provides constant, all-light aiming capability without batteries. Designed for close quarter combat. Features a large 30mm diameter lens which allows rapid target acquisition with both eyes open. Reticle illumination is achieved by a protected fiber optic light collector system during the day and by a miniature self-powered tritium light source at night. Transition between the two systems is instantaneous and automatic. Night vision compatible. Designed to work with a magnifier. Operates under all weather and temperature conditions. Armored design for hard combat use. No fiber optic tubes exposed. Quick release picatinny mount retains zero.