Smith & Wesson N frame Bolt assembly (cylinder catch) $65.00 Parts 22,23,24 on the exploded diagram. Used, excellent condition bolt assembly(cylinder catch) from a Model 57, N frame revolver. Will fit other models of N frame revolvers. Out of stock Category: Smith & Wesson Related products Smith & Wesson K frame center pin $20.00 Smith & Wesson K / L / N Frame Standard Shooters Pack $29.97