Leupold VX-3i 4.5-14x50mm Riflescope, 30mm Tube, Duplex Reticle DiamondCoat 2 Ion-assist lens coating, for higher light transmission and the greatest level of abrasion resistance ever offered by Leupold Features proprietary Argon/Krypton gas blend, which nearly eliminates the effects of thermal shock, and reduces the diffusion of gases sealed inside your scope even more than our proven nitrogen technology already does A versatile 3:1 zoom ratio erector system that is ideal for virtually any situation 1/4 MOA precision finger click adjustments for windage and elevation offer absolute repeatability and dependability over a lifetime of extreme use Crafted from 6061-T6 aircraft quality aluminum