Williams WGRS-54 Receiver Peep Sight Compact Low Profile Lightweight, Strong, Rustproof Positive Windage and Elevation Locks Made from an aluminum alloy For models: Savage-Ans chutz 54, 64, 141, 141M, 153, 153S; Remington 541S; Winchester 310, 320, 9422. (On 9422, a front sight height of .450 is required