The Lyman 66 Receiver "Peep" Sights deliver enhanced accuracy for your hunting rifle with a precision-built receiver sight designed for flat receivers on lever-action rifles like the Winchester 94 and Marlin 336, as well as modern shotguns and even SKS models. This sights system provides 1/4 minute audible click micrometer adjustments for elevation and windage, enabling precise, repeatable sighting in a variety of light and field conditions. A quick-release slide and coin-slotted stayset knobs ensure fast, secure adjustments, while two interchangeable aperture discsthe large hunting aperture for field shooting and the small target aperture for precision workoffer flexibility across different target sizes and distances. Crafted by Lyman to integrate cleanly with your existing receiver, the 66 Receiver Sights emphasize reliability and ease of use, helping you maintain consistent sight alignment and faster target acquisition during hunts or practice. Whether dialing in long-range shots or fine-tuning yardage on a familiar rifle, the Lyman 66 Peep Sights bring practical, repeatable performance to your optics-free aiming solution.