Description
Some guns earn their keep one carry day at a time, and the Smith & Wesson Model 642 Airweight has been doing exactly that for decades. This is the modern version of the Centennial design S&W has been refining since the early 1950s, built on the J-Frame that became the benchmark for small defensive revolvers. The aluminum alloy frame brings the weight down to about 15 ounces, while the stainless steel barrel and cylinder handle the wear and shrug off sweat and holster time. At 6.31 inches overall with a 1.875 inch barrel, it disappears in a pocket holster, a bag, or an IWB rig without a second thought.
Why the 642 Airweight Keeps Earning Carry Duty
The fully enclosed hammer is the heart of this design. There is nothing to snag on a cover garment or pocket lining, which means you can even fire it from inside a coat pocket if things ever go sideways. The double action only trigger keeps operation dead simple: pull the trigger, it fires. No safeties to fumble, no slide to rack, no magazine to seat. The cylinder holds five rounds of .38 Special, and the gun is rated for continuous +P use, so you can run modern defensive loads without babying it.
No Internal Lock, No Fuss
This particular version, part number 103810, ships without the internal key lock, which is exactly how a lot of revolver folks prefer their J-Frames. Cleaner sideplate, classic look, fewer parts. The integral front sight and fixed rear notch are machined tough and always zeroed, and the matte silver finish over the alloy frame pairs nicely with the stainless hardware. The black synthetic grip soaks up some recoil while keeping the footprint small.
Living With a Smith & Wesson 642
The 642 rewards practice. The DAO pull is long and deliberate by design, and regular range time with standard pressure ammo will make you smooth with it fast. Wadcutters make pleasant practice loads, and holster options are everywhere since this frame size has been around forever. It is a proven, grab and go revolver that does its one job extremely well.
Key Specifications
- Model: 642 Airweight (No Internal Lock)
- Manufacturer Part Number: 103810
- UPC: 022188038101
- Caliber: .38 Special +P
- Capacity: 5 Rounds
- Action: Double Action Only
- Barrel Length: 1.875"
- Overall Length: 6.31"
- Weight: 15 oz (unloaded)
- Frame: Aluminum Alloy J-Frame
- Barrel/Cylinder Material: Stainless Steel
- Finish: Matte Silver
- Sights: Integral Front, Fixed Rear
- Grip: Black Synthetic
- Hammer: Fully Enclosed (Internal)
- Internal Lock: None
What’s Included
- Smith & Wesson 642 Airweight revolver
- Black synthetic grip (installed)
- Cable lock
- Owner's manual
Frequently Asked Questions
Can the S&W 642 Airweight handle +P ammunition?
Yes. The 642 is rated for continuous +P use, so you can carry and practice with modern +P defensive loads without concern. That said, standard pressure .38 Special is noticeably softer to shoot in a 15 ounce gun, so many owners practice with standard loads and carry +P.
Does this version of the 642 have the internal lock?
No. This model, part number 103810, is the no internal lock version. There is no keyhole on the sideplate, which gives it a cleaner, classic look and is the configuration most J-Frame fans ask for.
Can you cock the hammer on the 642 for single action shots?
No, and that is by design. The hammer is fully enclosed inside the frame, so the gun is double action only. The upside is a completely snag-free profile that draws cleanly from a pocket or under clothing, which is exactly what this revolver was built for.
How does the 642 compare to the Model 442?
They are mechanically the same revolver. The 642 wears a matte silver finish over its alloy frame with stainless steel barrel and cylinder, while the 442 is the black version with a carbon steel cylinder. Pick whichever finish suits you, since performance and dimensions are identical.




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