Meprolight M21 Self-Illuminated 1x30 Reflex Sight (Fiber-Optic/Tritium, No Batteries)
The Meprolight M21 is a day/night self-illuminated reflex sight that runs on fiber-optic illumination in daylight and tritium in low light, with no switches and no batteries required. Built around a 30mm lens and designed for both-eyes-open shooting, it delivers a wide field of view with a parallax-free aiming system.
This unit includes the Polarizer & Flash Guard set. The polarizer provides 19 dimming settings to help manage reticle washout in bright conditions, and the flash guard helps reduce lens flare and objective reflection.