UTG 4-16X56 30mm Scope, AO, 36-color Glass Mil-dot, w/ Rings Side Wheel Adjustable Turret (SWAT) for Parallax Adjustment C From 10 Yards to Infinity 30mm Tube with Best in Class Emerald Lens Coatings to Achieve Maximum Light Transmission for Best Clarity, Built on True Strength Platform, Completely Sealed and Nitrogen Filled, Shockproof, Fogproof and Rainproof Innovative EZ-TAP llumination Enhancing (IE) System with Red/Green in Dual-Color Mode and 36 Colors in Multi-Color Mode to Accommodate All Weather/Light Conditions 1-Click Technology for Quick Access to Your Favorite Color and Brightness in Reticle, Premium Zero Lockable and Zero Resettable Target Turrets with Most Consistent and Precise 1/8 MOA per Click Adjustment Mil-dot Range Estimating Etched Glass Reticle with Built-in Integral Sunshade for Most Optimal Aiming and Shooting Performance, Complete with High Quality Flip-open Lens Caps.