The Leupold Mark AR 3-9x40mm riflescope is designed for AR15/M-16 style rifles delivers high performance. Its 1/2-MOA T2 elevation adjustment includes a pre-engraved bullet drop compensation (BDC) dial to match the ballistics of most 55 grain .223 Remington/5.56mm NATO loads; and the Leupold Custom Shop can create custom dials to match your exact ballistics. Whether shooting an AR15 platform or a bolt action, the Mark AR’s Multicoat 4 Lens System delivers peak light transmission, edge-to-edge sharpness across the visual field, and optimal contrast. The riflescope is completely waterproof and fog proof.