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 Color: Green/Tritium White OutlineFrame Material: SteelFrame Color: BlackFirearm Fit: Glock Gen 5 9mm/.40Style: Rear Sight TritiumRear Material: TritiumFirearm Type: Handgun