TRUGLO Trupoint Open Red Dot Sight

Waterproof/fog proof, shock resistant,tubeless design, ultra lightweight (less than 2oz.), unlimited eye relief, 4 MOA dot for fast target acquisition, “auto mode” uses a light sensitive rheostat to automatically adjust the brightness of the aiming dot,“manual mode” overrides, low power consumption for long battery life, replace battery without removing sight, windage and elevation adjustments with locking screws,integrated Weaver-style mounting system.Lifetime limited warranty.