S&W J Frame Model 642-2 Airweight Firing Pin .38 Special +P – Part# 642F

Smith & Wesson J Frame Model 642-2 Airweight Firing Pin – Stainless Steel

Restore reliable primer ignition on your Model 642-2 Airweight with this factory-original firing pin. The firing pin is the component that strikes the primer to initiate ignition — on the 642-2, it is frame-mounted and driven by the transfer bar system, which only allows the firing pin to contact the primer when the trigger is fully depressed, providing a critical passive safety. A worn, chipped, or broken firing pin causes light strikes, misfires, or complete failure to fire. This stainless steel firing pin is the correct factory replacement for the J Frame Model 642-2 chambered in .38 S&W Special +P.

• Part Number: 642F
• Fits: Smith & Wesson J Frame Model 642-2 Airweight
• Caliber: .38 S&W Special +P
• Part Type: Firing Pin (Frame-Mounted)
• Finish: Stainless Steel
• Condition: Used (factory original)
• Installation: Professional gunsmith fitting required – firing pin fit and transfer bar engagement are critical safety functions

Factory Replacement Quality

Genuine Smith & Wesson factory part manufactured to the exact specifications and tolerances of the original — same dimensions, same tip geometry, same reliable primer ignition. No aftermarket substitutes.

Finding Your Model Number

Swing out the cylinder and check behind the yoke on the frame. Model numbers have been stamped there since 1957–58. If your revolver has no model number, it predates that era — contact us with the serial number and we'll help identify the correct part.

Questions? Call or email us — we're happy to help you get the right part the first time.