Truglo Trupoint Open Red-Dot Sight - $139.88

An innovative tubeless red-dot sight that is waterproof and fogproof. Shock-resistant on firearms up to .50 caliber. At only 2 oz., you won't even know it's on your gun. TruPoint features unlimited eye relief, a 4-MOA dot for quick, easy target acquisition, and a light-sensitive rheostat for brightness control. The sight is fully adjustable for windage and elevation. A special lens coating completely eliminates double-dot or split images. It has low power consumption for long battery life and an accessible on/off switch. When a battery does have to be replaced, you can do it without removing the sight. Includes a protective plastic cover. The TruPoint is ideal for shotguns, handguns, paintball guns, airguns and crossbows. Limited lifetime warranty. - $139.88