Meprolight Fiber-Tritium Bullseye Rear Sight for Glock MOS Green

The Meprolight Fiber-Tritium Bullseye Rear Sight for Glock MOS Green delivers rapid target acquisition and reliable sighting in low-light and no-light conditions—critical capabilities for law enforcement, military, and serious civilian operators. Designed specifically for Glock MOS-compatible pistols, this rear sight combines fiber optic technology with tritium self-luminous elements to ensure you maintain a bright, visible sight picture whether in daylight or complete darkness. Built by Meprolight, an Israeli manufacturer with decades of experience in combat optics and tactical sighting systems, this sight represents the convergence of battle-tested engineering and modern sight design philosophy.

The bullseye-pattern rear sight features a fiber optic channel that gathers ambient light during the day, producing a bright green aiming reference without batteries or electronics. When light fades, tritium gas tubes activate, providing continuous luminosity for hours—a dual-illumination system that eliminates the need to choose between daylight brightness and night vision compatibility. The green tritium provides distinct contrast against most backgrounds and offers faster sight alignment compared to traditional iron sights, reducing split times in defensive scenarios. The compact, low-profile design integrates seamlessly with the Glock MOS platform, maintaining the slide's ergonomics while adding decisive aiming advantages.

This sight is ideal for operators who depend on pistol-mounted optics but require a co-witness or backup aiming solution, or who prefer iron sights as their primary system. It pairs naturally with reflex sights, holographic sights, or magnified optics mounted on the MOS system, allowing quick transition to irons if the primary optic fails or becomes obstructed. Law enforcement agencies, military units, and armed civilians running modern Glock platforms benefit from the speed and reliability this rear sight delivers. Installation is straightforward on any Glock MOS receiver; no gunsmithing required.