Vortex Defender-CCW Micro 1x Red Dot - 3 MOA Defender Dot - Handguns. Shotguns. Offset on a carbine. Whether running drills at the range or holding the line during rigorous duty use, the all-purpose Defender-ST delivers the toughness, accuracy, and adaptability your challenging world demands. Large Viewing Window - For fast target acquisition and large field of view Aspherical Lens - For distortion-free sight picture and truer colors ShockShield Polymer Insert - To protect against hard, daily abuse Fast-Rack Texturing - Aggressive texturing on face of optic for racking slide off any surface Motion Activation with 10 Minute Auto-Shutoff - Automatically activates with motion while 10 minute auto-shutoff saves battery life Button Lockout - Prevents accidental brightness adjustment during use or transport Top Mount Battery - Easy battery change without having to re-zero your optic 10 Daylight Bright Brightness Settings - Daylight bright, illuminated center dot aids in faster center-point acquisition in bright daylight conditions Night-Vision Compatibility - The lowest 2 settings are night-vision compatible Parallax Free - All 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 will make a negligible difference in performance Unlimited Eye Relief - Non-critical eye relief for rapid target acquisition Low-Glare Matte Tan Anodized - Corrosion and wear resistant anodization provides low-glare matte surface and helps camouflage the shooter's position Single-Piece Chassis - Compact and lightweight Waterproof - Designed to withstand harsh weather conditions Fogproof - Designed to withstand a wide range of temperatures Shockproof - Rugged construction withstands recoil and impact