As tough as Trijicon's legendary ACOGA(R) scopes, the low-profile RMR(TM) (Ruggedized Miniature Reflex) sight enables fast, both-eyes-open, target acquisition-even in poor lighting conditions. Unlimited eye relief allows natural presentation from almost any shooting position, plus clear, unobstructed panoramic views for maximum situational awareness. Mount an RMR on your rifle to supplement your ACOG, and you're ready to address targets at any range. Performs in the harshest operating conditions thanks to a computer-optimized geometric housing of high-strength, forged, military-grade, aluminum that absorbs shock and diverts stress away from the lens. Simple to op Mfg: Trijicon