Smith & Wesson J Frame Model 640-3 Hammer & Trigger .357 Magnum MIM Used M&P Victory Model This is the old style

This is the old style design — a critical internal component that controls cylinder lockup timing

Genuine Smith & Wesson OEM - Factory part

Note: This part has been discontinued by Smith & Wesson — limited remaining stock

The Model 342 AirLite is S&W's ultra-lightweight Centennial-style J Frame

Complete bolt and slide assembly

Smith & Wesson J Frame Model 640-3 Hammer & Trigger .357 Magnum MIM Used M&P Victory Model This is the old styleSmith & Wesson J Frame Model 640 3 Hammer & Trigger . 357 Magnum MIM Used (Part# J64031) This listing is for one used Smith & Wesson J Frame Model 640 3 hammer and trigger assembly chambered for . 357 Magnum. These are MIM (Metal Injection Molded) OEM factory parts in used condition, removed from a functioning firearm. The Model 640 Centennial features a concealed internal hammer for snag free carry. Compatibility note: This assembly is specifically