Smith & Wesson Model 639 9mm Stainless DA/SA Pistol, Second Generation, 4 in Barrel, Single-Stack 8+1
This Smith & Wesson Model 639 is a second-generation, full-size 9mm built with a stainless-steel frame and slide. It features a DA/SA operating system with an ambidextrous slide-mounted safety/decocker, fixed sights, and single-stack 8+1 capacity. Notable second-generation details include an external extractor, a separate barrel bushing at the muzzle, a checkered front strap, and a checkered backstrap. The model was discontinued in 1988 and succeeded by the 3906.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: There are markings and areas of surface rust from previous handling and use. The bore is bright and clean.
What’s Included
- Smith & Wesson Model 639 pistol (9mm)
- 1x 8-round single-stack steel magazine
The Model 639 is a stainless-steel evolution of S&W’s 39-series, offering a durable build with both the frame and slide finished in stainless. This example is a full-size pistol with a 4 in barrel and classic second-generation styling, including a rounded trigger guard with a serrated front face, a checkered front strap, and a checkered backstrap.
Its DA/SA action is paired with an ambidextrous, slide-mounted safety/decocker, a firing pin block, and a magazine disconnect. Controls are straightforward, with a left-side magazine release and an 8+1 single-stack magazine configuration.
The slide assembly uses an external extractor and a separate barrel bushing at the muzzle. Sights are fixed, with a serrated ramp front and a fixed rear notch. The barrel hood is marked "9MM PARABELLUM," consistent with the model’s 9mm Luger chambering.
As a second-generation S&W 39-series pistol from the 1980s, the 639 reflects the company’s transitional design features of that era. The model was discontinued in 1988 and succeeded by the 3906. This example retains checkered wood grips with S&W medallions and was made in the United States.