S&W J Frame Model 642-2 Airweight Trigger .300" Wide (MIM) .38 Special +P – Part# 642L

Smith & Wesson J Frame Model 642-2 Airweight Trigger .300" Wide (MIM) – Stainless Steel

Upgrade or restore your Model 642-2 Airweight with this factory-original .300" wide MIM trigger. At .300" wide, this trigger provides a broader contact surface than the standard narrow trigger, distributing the double-action pull across more of the finger for a more comfortable and controlled shot — a popular choice for shooters who carry the 642 as a daily concealed carry revolver. This MIM (Metal Injection Molded) stainless steel trigger is the correct factory replacement for the J Frame Model 642-2 chambered in .38 S&W Special +P.

• Part Number: 642L
• Fits: Smith & Wesson J Frame Model 642-2 Airweight
• Caliber: .38 S&W Special +P
• Trigger Width: .300"
• Material: MIM (Metal Injection Molded)
• Finish: Stainless Steel
• Condition: Used (factory original)
• Installation: Gunsmith fitting recommended

About MIM Parts

Metal Injection Molding (MIM) is a precision manufacturing process used by Smith & Wesson and other major firearms manufacturers to produce complex internal components with tight tolerances and consistent quality. MIM parts are genuine factory components — not aftermarket substitutes — and meet the same specifications as traditionally machined parts.

Factory Replacement Quality

Genuine Smith & Wesson factory part manufactured to the exact specifications and tolerances of the original — same dimensions, same sear engagement geometry, same reliable trigger function. 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.