M-223 Riflescope 3-12x42mm Side Focus Nikoplex Reticle Matte Black Finish. Fully multi-coated optical system provides superior light transmission and maximum brightness from dawn to dusk. Caliber specific technology for AR-style rifles. Four inches of constant eye relief. Instant Zero-Reset Tactical-style turrets. One piece main body tube. Smooth zoom control. Waterproof, fog proof and shockproof.