Frame manufactured in 1977-1978. Fixed front sight highlighted with red paint and a fully adjustable rear sight. The left side of the frame is stamped ".057" after the S&W serial number. Bobbed hammer, shortened barrel, and fluted slide. There is a hook added to the trigger guard and the right side is trimmed for faster access to the trigger. Fitted with a set of smooth "DEVEL" marked grips with clear windows for viewing the magazine. Includes an extra magazine.