Vortex Optics 3x21 Spitfire HD Gen II Prism Scope, Red Illuminated AR-BDC4 Ret

With a redesigned HD optical system that cuts inches and ounces off the original platform, the new Spitfire HD Gen II 3x and 5x models are a shooter's dream come true. Choose your ideal magnification and mounting height, then rely on the BDC-style reticle to subtend with most popular 5.56 cartridges for quick holdovers at known distances, keeping you locked on target.Optical FeaturesHD Optical SystemOptimized to deliver exceptional resolution, cut chromatic aberration, and provide outstanding edge to edge sharpness and light transmission.Brightness Settings12 levelsNight-Vision CompatibilityThe lowest 2 settings are night-vision compatible.Construction FeaturesWaterproofO-ring seals prevent moisture, dust and debris from penetrating for reliable performance in all environments.ShockproofRugged construction withstands recoil and impact.FogproofNitrogen gas purging prevents internal fogging over a wide range of temperatures.Nitrogen Gas PurgedGas purged and o-ring sealed for fogproof and waterproof performance in all conditions.Low-Glare Matte Black AnodizedCorrosion and wear resistant anodization provides low-glare matte surface and helps camouflage the shooter's position.Compact, Lightweight DesignRugged construction that's still compact, with a lightweight form-factor.