Specifically calibrated for the .223, the Sightmark Core TX 1-4x24 AR-223 Riflescope sets the standard when taking close-medium range shots. Perfect for tactical operations, competition, target shooting or hunting, the Core TX 1-4x24 Riflescope features exposed, lockable turrets helping prevent loss of zero. Variable 1-4x magnification and a fine-etched bullet-drop-compensating (BDC) reticle, including adjustable red and green illumination, makes target acquisition faster and easier, even in low-light conditions. The Core TX 1-4x24 even includes a throw lever for lightning fast, on-the-fly magnification adjustments. Hard-anodized, matte black, 6061-T6 aircraft-grade aluminum construction and advanced, fully multi-coated glass provides the same uncompromising quality and image performance demanding shooters have come to expect from Sightmark. Ready to handle your extreme environments, the Sightmark Core TX 1-4x24 AR-223 Riflescope is nitrogen-filled, waterproof, fog proof, dustproof and shockproof.