AmeriGlo brings a clear advantage to your shooting experience on and off the range. The original standard in self luminous night sights, the Classic 3-dot design is the most popular among personal defense, military, and law enforcement. It is machined of steel and utilizes Swiss-made tritium light sources. This model is compatible with Glock Gen 5 with or without MOS slide. Rear Sight Height: 0.276.Specifications: Fit: Glock Gen 1-5 Firearm Type: Handgun Style: Tritium Square-Notch Rear Rear Color: Green/Tritium White Outline Frame Material: Steel Frame Color: Black