Ade Advanced Optics 4x32 Fixed Power Green/blue/red Illuminated Reticle Compact Rifle Scope with Fiber Optic Tactical Sight and Weaver Slots Magnification 4X Fixed , Objective Diameter - 32mm Illuminated Red-Green-Blue Rapid Range Glass Etched Reticle 100% Shock and Recoil Resistant, Nitrogen Filled, Shockproof, Fogproof, and Water Resistant 6061 T6 Aircraft Grade Body Six-inch total length, 30-millimeter tube diameter, 32-millimeter objective lens, and 3.5-inch eye relief