WILLIAMS 5D SERIES RECEIVER PEEP SIGHT Available for most of the more popular guns - the inexpensive, quality-made 5D sight. These sights are patterned after the Foolproof. They have the same strength, lightweight, and neat appearance, but without the micrometer adjustments. Designed for rugged hunting use, the 5D sights are dependable and accurate. The upper staff of the Williams 5D sight is readily detachable. It is only necessary to loosen one screw so that the upper staff slides easily in the close-fitting dovetail. The angular bushing locks this upper staff in a positive manner. A set screw is provided as a stop screw so that the sight will return to absolute zero upon detaching and reattaching. The material used in the manufacture of the Williams 5D sight is one of the highes grade alloys obtainable. SPECIFICATIONS: - Laboratory tests show that the material used has a tensile strength approximately 25 greater than mild steels. - This high-grade alloy is finished with an anodize in a deep blue-black that adds even further to the strength of the sight by creating an extra hard surface. - Standard thread sizes, the same as used on the Foolproof, permit the use of a wide range of apertures for all sighting conditions. - Twilight apertures interchangeable - All 5d receiver sights are furnished with the standard r-3/8 x .093 aperture [except as indicated] - All other sizes of regular and twilight apertures are available as accessory items