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Leupold is the leader in high performance scopes. The Mark 3HD is a rugged, precise, and reliable MIL-based scope for the AR-15 rifle. The 1.5-4x magnification makes the Mark 3HD the ideal scope for close to intermediate target engagements. A throw lever on the magnification ring allows for smooth and fast transitions between 1.5x to 4x. The AR Ballistic reticle is calibrated for 5.56/.223 Remington ammunition using a 200 yard zero. Hash marks on the reticle are calibrated up to 600 yards. Get on target with Leupold.