The Bushnell Optics Matte Black Drop Zone-223 Reticle 1-4x/24mm Riflescope with Target Turrets features target turrets (0.1 mil click value) for pinpoint-precise adjustments, plus caliber-specific reticle to deliver every round with peerless accuracy. The scope features fully multi-coated optics for incredible brightness and the fast focus eyepiece delivering maximum accuracy and reliability. Drop Zone-223 BDC reticle is calibrated for 55-62 grain, 223 REM/5.556 loads. Zeroes at 100 yards, with aiming points out to 500 yards. Nitrogen purged to remove any vestige of internal moisture, and O-ring sealed to prevent the entry of dust or moisture. Made of high-durability aluminum alloy, anodize-finished and sealed to protect the inside from elements. Riflescope is rustproof, virtually scratchproof and a beautiful complement to even the most expensive AR platform firearm.