Twod Red Green Dot Sight 1x30mm/1x40mm Rifle Scope 20mm Picatinny Weaver Mount Illuminated Reticle Hunting Waterproof, shockproof, and fogproof. 1/4" MOA windage and elevation adjustments 3" eye relief with rubber fast-focus eye piece Multi-coated crystal lenses provide increased clarity even in low-light conditions Black anodized aluminum construction.