Williams WGRS apertures have a long shank to fit the WGRS receiver sight. The Twilight Series are designed for shooting under poor light conditions. They create a sharp contrast that gives quick definition to the aperture hole.
Lyman and Redfield Receiver Sights
Gunsmithing Required: No
Lighter colored ring around aperture creates a a sharp contrast to give quick definition to aperture hole in low-light
conditions; also eliminates "fuzz" which robs clarity
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