Truglo's tfo sights provide a bright and reliable sight picture.It combines truglo's tritium and fiber-optic technologies for a fast and accurate shot.The tfo has unbelievable transition through all light conditions, glows in the dark, and requires no batteries.Constructed of cnc-machined steel with a snag-resistant design the concealed fiber cannot be seen by the target.This model is compatible with 1911 government-style handguns with existing fixed novak lomount dovetail cut slides.Rear Color: GreenType: Front/Rear SetFrame Material: SteelFrame Color: BlackFirearm Fit: 1911 w/Novak 260 Front, 450 RearBase Configuration: Novak .260-.450Style: SquareFront Material: Tritium/Fiber OpticRear Material: Tritium/Fiber OpticFront Color: GreenFirearm Type: Handgun