TACFUN Prismatic Series 4X32MM Scope W/Rapid RANGING Reticle Milled from one solid piece of aircraft grade aluminum to withstand constant heavy recoil Fog proof and shock-resistant housing Nitrogen charged with weather resistant seals Green fused multi-coated lens provides superior light transmission, resolution and scratch resistance Tri-illuminated (Red, Green, Blue) reticles with adjustable rheostat for brightness control Angle cut sunshade reduces glare under bright light conditions Windage and elevation adjustment 3.5 Inch eye relief provides safety from heavy recoil and enables fast target acquisition Laser etched reticle Fully adjustable back-up rear iron sight Back-up fiber optic front sight Integrated tri-Weaver / Picatinny 1913 accessory rails and mount