Smith & Wesson J Frame Model 640 Cylinder Assembly - Stainless Steel .38 Special - Used OEM Part 64063 Model 24 Part Number: N426

Part Number: N426

Precision-machined to Performance Center standards

Reduced Power Options: Lighter hammer fall for improved trigger pull

Smith & Wesson N Frame

Material: Steel body

Smith & Wesson J Frame Model 640 Cylinder Assembly - Stainless Steel .38 Special - Used OEM Part 64063 Model 24 Part Number: N42664063 Smith & Wesson J Frame Model 640 Used Cylinder Assembly . 38 Special Email or call us for your Smith and Wesson gun part needs! How to determine the model number of your Smith & Wesson Revolver. Swing out the cylinder , check behind the yoke on the frame for a MODEL NUMBER. Model numbers began in 1957 58. So if there is no model number then your revolver may be older than 1957 58. In this case we can possibly still find the part you need with