Combining superior materials with premium engineering, the Vortex Raxor Red Dot Sight represents a high-end reflex sight built for top-tier performance and incredible versatility. Comes with Vortex unlimited lifetime "VIP Warranty".Construction Features and Benefits Waterproof: O-ring seals lock out moisture, dust, and debris in all conditions Fog-proof: Argon gas purging prevents internal fogging through wide range of temps Shock-proof, rugged construction withstands recoil and impact Hard-Anodized finish: highly durable, glare-reducing matte finish Lightweight and compact single piece chassis Optical Features and Benefits Proprietary XR Plus anti-reflective coatings deliver maximum light transmission ArmorTek coating protects exterior lenses from scratches, oil, and dirt Parallax free for easy, reliable accuracy at varying angles Bright, easy-to-see 3-MOA red dot for precision with any lighting condition or background Unlimited eye relief promotes rapid and reliable target acquisition Variable brightness with 9 settings to match the lighting situationLug/Screw Footprint CompatibilityCompatible with C-more STS. Mounting to handgun with slide cutout: For Glock MOS (9mm or .40): use plate #3 For Glock MOS (.45 or 10mm): use plate #7 Included Accessories Picatinny Mount 1.5mm Hex Wrench 2.5mm Hex Wrench CR2032 Battery.