This is the same rail that came with Mark 3 LITE pistols and will mount with the factory drilled holes. 3 screws included, Rail is 4-3/8" long. Can be mounted two ways (see pics above) with or without rear sight. Black Aluminum,, colors and shades may vary from my lighting This Rail is for pistols that have been drilled and tapped to factory Ruger pattern. These are new from Ruger never installed (We are a Ruger parts dealer)

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