251170000 Smith & Wesson Magazine Release for Auto Pistols New 4013 The cylinder stop (also called

The cylinder stop (also called the bolt) locks the cylinder in alignment with the barrel at the moment of firing — essential for accuracy and safe operation

and long-term durability

K Frame barrels are frame-specific and not interchangeable with J

Installation Note: Professional gunsmith installation required

251170000 Smith & Wesson Magazine Release for Auto Pistols New 4013 The cylinder stop (also called251170000 Smith & Wesson Magazine Release for Auto Pistols New Fits Models SW9C, SW9E, SW9F, SW9G, SW9GP, SW9P, SW9V, SW9VE 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 the serial #