No-drill, no-tap mount attaches to frame at the rear sight screw. Contoured recoil lug fits in rear sight slot to prevent movement. Accepts Weaver-style rings. Use on .22 LR only, not for use on .32 Magnum guns.
Big Book Catalog, Issue:72, Page:255
SPECS: Extruded aluminum, black or silver, anodized, matte finish. 4½" (11cm) long, 7⁄8" (22mm) wide, 1.3 oz. (38 g) wt. Includes mounting screws.