Built on True Strength Platform, Completely Sealed and Nitrogen Filled, Shockproof, Fogproof, and Rainproof. Up to 25" of Eye Relief Allowing for Effective Use on Handguns. Projectile Drop Compensation Reticle Assists Shooting at Difference Distances. Screw Lockable Turrets with Most Consistent and Precise 1/4MOA per Click Windage/Elevation Adjustment. Adjustable Eyepiece with Locking Ring for Additional Security. Emerald Coated Lenses to Achieve Maximum Light Transmission for Best Clarity. Parallax Pre-set at 35Yds. Complete with Medium Height Picatinny/Weaver Rings and High Quality Flip-open Lens Caps.