AmeriGlo Green Tritium Lamp Orange Outline FRONT Green Single Dot REAR. One of the most challenging aspects of acquiring a target at night is acquiring a vertical sight alignment which is an essential part of shooting efficiently. These Pistol Parts developed by AmeriGlo Night Sights - Trusted by Professional and Amateur Shooters The World Around use a dot-over-dot configuration to guide your aim on target without consuming any of your battery power. However this setup can significantly decrease your sight acquisition time since your aiming point will be positioned further back on your sight blade axis. However this setup can significantly decrease your target acquisition time since both of these sights position your eyes in a dangerously close position to the sight. When you need to quickly acquire your target at a moment's notice trust these AmeriGlo Springfield XD I-Dot Tritium Night Sights to guide your aim while taking down targets with peak accuracy. Specifications for AmeriGlo Springfield XD I-Dot Tritium Pistol Sight Sets: Manufacturer: AmeriGlo Color: Black Sight Style: Square-Notch Front Blade Height: 0.26 in Rear Blade Height: 0.316 in Package Contents: AmeriGlo Springfield XD I-Dot Tritium Pistol Sight Sets AmeriGlo XD-201: Green Tritium Lamp Orange Outline FRONT Green Single Dot REAR