Smith & Wesson K frame Yoke, old style with gas ring $100.00 Part 31 on the exploded diagram. Used, excellent condition yoke, old style with gas ring from a 19-4, K frame revolver. Will fit other models of K frame revolvers. Out of stock Category: Smith & Wesson Related products Smith & Wesson K frame Extractor rod collar $10.00 S&W 39/439/3904 series XP magazine springs 3 pak $34.97