Safariland B-Square Smith and Wesson K, L, N Frames Post 1993 Longer Barrel/Rossi 971 Non-Vent Rib Model only, 6-Inch Non-Ported Barrel, Matte Stainless Finish Rings not included Fits all K, L, N frames and Rossi 971 non vent rib model only w/6-Inch non ported barrel Fits all calibers with 5-Inch barrel lengths and longer Uses rear sight recess for recoil stop and mount attachment Stainless steel finish