Smith & Wesson J Frame Model 42 Centennial Airweight Cylinder Stop & Spring - Part #J4281

Smith & Wesson J Frame Model 42 Centennial Airweight – Cylinder Stop & Spring

Keep your Model 42 timing right with this original factory cylinder stop and spring set. The cylinder stop is the critical component that locks the cylinder in alignment with the barrel at the moment of firing — essential for accuracy and safe operation. This is an old-style used part in good working condition, pulled from a factory S&W revolver.

Part Details

• Part Number: J4281
• Condition: Used – Old Style
• Fits: Smith & Wesson J Frame Model 42 Centennial Airweight
• Caliber: .38 Special
• Frame: J Frame
• Includes: Cylinder Stop & Spring

Compatible Models

This old-style cylinder stop and spring is compatible with the following Smith & Wesson J Frame revolvers:

• Model 42 – Centennial Airweight (.38 Special, hammerless, aluminum alloy frame)

Note: Verify fitment before installation. Old-style parts may not be compatible with newer production Model 42 revolvers. When in doubt, consult a qualified gunsmith.

Why Replace Your Cylinder Stop?

A worn or broken cylinder stop causes the cylinder to rotate past the locked position, resulting in misalignment, misfires, or dangerous out-of-battery firing. Replacing this part restores proper timing and safe function to your revolver.