The Mako Group M21 Meprolight Day/Night Self-Powered Red Dot Reflex Weapon Sight provides constant, all-light aiming capability, without the need of a battery supply. Reticle illumination on this Reflex Sight by the expert engineers at Mako-Group, is achieved by a protected fiber optic light collector system during the day, and by a miniature self-powered tritium light source at night. Night vision compatible, the Mako Meprolight Self Powered Reflex M21 Tactical Sight features a large 30mm diameter lens that provides rapid target acquisition with both eyes open. This Mako Group Red Dot Sight has a quick-release Picatinny mount that perfectly retains zero. Designed through close collaboration with Israeli Special Forces, the Mako Red Dot M21 Meprolight Self-Powered Red Dot Reflex Weapon Sight is the first reflex sight in the world designed for close quarter combat. Features Designed for CQC Rapid target acquisition Protected fiber optic light collection for daytime Miniatu Mako Group Mepro M21 Reflex Sight Mepro M21 Reflex Sight Reticle