Williams WGRS Rear Peep Sight for H&R 158, 258 Topper Single Shot Rifles, Ruger Mark II

Williams WGRS Guide Receiver Peep Sights are compact low profile sights. They are lightweight, strong and rustproof with positive windage and elevation locks. In most cases the sight utilizes the existing screws on top of the receiver for installation. FeaturesCompact Low ProfileLightweight, Strong, RustproofPositive Windage and Elevation Locks Note: Standard R-3/8 x .093 Long Shank Aperture