This Steiner Military 4-16x50mm scope with Mil-Dot G2B reticle features 11 illumination steps, 7 for night and 4 for day, plus 10 standby light-off settings, aircraft grade machined aluminum knobs, parallax and windage adjustment, nitrogen filled for fog prevention, shock resistance up to 900 Gs, and is waterproof down to 5 meters. Specifications: Steiner Military 4-16x50mm Mil-Dot G2B B870100101 - Blemished