Williams Gun Sight Co 1/4 inch U Blade

Precision-made sight blades milled from high-tensile strength, rustproof alloy. Dovetailed windage and elevation adjustments have hardened gib locks. Make adjustments quickly by loosening one screw. No dovetailing of barrel necessary. Blades sold separately. Blades can also replace the aperture on WGRS sights. Mfg: Williams Gun Sight SPECS: Blades: aluminum, black anodized finish. Blade Height and range of adjustment - 3/16" (4.8mm) -.369" (9.4mm) to .431" (10.9mm). 1/4" (6.3mm) - .431" (10.9mm) to .493" (12.5mm). 5/16" (7.9mm) - .493" (12.5mm) to .555" (14.1mm),