The rush of competitive shooting may bring us all together. But when you want an optic that sets you apart, depend on the Defender-ST. Target to target. Stage to stage. It's built tough as nails around a massive sight window that delivers greater peripheral vision and increased speed for follow-up shots, so you always come out on top.Bright Green DotTargets quickly in varied lighting and diverse backgrounds.Large Viewing WindowFor fast target acquisition and a large field of view.ShockShield Polymer InsertTo protect against hard, daily abuse.Fast-Rack Textured GripAggressive texturing on the face of optic for racking slide off any surface.Motion Activation with 10 Minute Auto-ShutoffAutomatically activates with motion, while the 10-minute auto-shutoff saves battery life.Button LockoutPrevents accidental brightness adjustment during use or transport.Top Mount BatteryEasy battery change without having to re-zero your optic.10 Daylight Brightness SettingsDaylight bright, illuminated center dot aids in faster center-point acquisition in bright daylight conditions.Night-Vision CompatibilityThe lowest 2 settings are night-vision compatible.Parallax FreeAll green dot and holographic sights will exhibit some small amount of parallax. Matching current industry practice, this small amount would be considered parallax-free and would make a negligible difference in performance.Unlimited Eye ReliefNon-critical eye relief for rapid target acquisition.Low-Glare Matte Black AnodizedCorrosion and wear-resistant anodization provides a low-glare matte surface and helps camouflage the shooter's position.Single-Piece ChassisCompact and lightweight.WaterproofDesigned to withstand harsh weather conditions.FogproofDesigned to withstand a wide range of temperatures.ShockproofDesigned to withstand the highest levels of recoil and impact.