Smith & Wesson Model 640 – .357 Magnum 5-Round
Pros & cons
What works
- Stainless steel construction withstands .357 Magnum pressures indefinitely—unlike polymer frames that degrade over time
- 23-ounce weight manages recoil better than 17-ounce polymer alternatives while remaining concealable
- Enclosed hammer prevents snagging during draw—0.02-second faster deployment than exposed hammer models
- 5-round moon clip system enables reloads 1.5 seconds faster than traditional speed loaders
Trade-offs
- Double-action-only trigger requires 12-pound pull—demands significant practice to master compared to 6-pound SA/DA triggers
- .357 Magnum recoil generates 22 ft-lbs force in 23-ounce frame—40% more muzzle flip than .38 Special loads
- Fixed sights limit zeroing options—no windage or elevation adjustment unlike our [Stevens 334 Rifle](/products/stevens-334-243win-20-3rd-black/)
- 5-round capacity trails modern micro-compacts by 50%—requires more frequent reloading in defensive scenarios
Video review
Expert review
Specs at a glance
About this product
What is the Smith & Wesson Model 640? It's a stainless steel J-frame revolver chambered in .357 Magnum with a 5-round capacity and double-action-only operation designed for concealed carry. Built on Smith & Wesson's proven small-frame platform, this revolver balances durability with concealability through its all-steel construction and enclosed hammer design. The Model 640 represents the intersection of traditional revolver reliability and modern defensive cartridge performance.
What is the Smith & Wesson Model 640 used for?
This revolver serves primarily as a concealed carry and backup weapon for experienced shooters who demand reliability above all else. Its 23-ounce weight and compact dimensions make it suitable for ankle or pocket carry, while the .357 Magnum chambering provides definitive stopping power when loaded with appropriate defensive ammunition. The double-action-only trigger and enclosed hammer prevent snagging during rapid deployment scenarios.
How does the Smith & Wesson Model 640 compare to the Ruger LCR?
The Model 640 offers superior durability with its all-stainless construction compared to the Ruger LCR's polymer frame, though it weighs approximately 5 ounces more. While the LCR's polymer frame reduces recoil perception, the Model 640's steel frame absorbs .357 Magnum recoil more effectively through mass distribution. For shooters prioritizing long-term durability over minimal weight savings, the Model 640 represents the better investment.
What does it weigh and what are the dimensions?
The Model 640 weighs 23 ounces empty and measures 6.31 inches in overall length with a 2.125-inch barrel. Its cylinder width measures 1.31 inches, making it comparable in profile to most compact semi-automatic pistols while maintaining revolver reliability. The 5-round capacity reflects the practical limitations of J-frame dimensions while providing adequate defensive capability.
Who is this NOT for?
This revolver is not suitable for new shooters or those sensitive to recoil, as .357 Magnum generates significant muzzle flip in a 23-ounce platform. The double-action-only trigger requires approximately 12 pounds of pressure per shot, demanding substantial finger strength and practice to master. Those seeking high-capacity defensive options should consider semi-automatic alternatives like our the Stevens 334 Rifle instead.
What's in the box?
The factory package includes the revolver, one 5-round moon clip, owner's manual, and Smith & Wesson security lock. Unlike some competitors, Smith & Wesson does not include cleaning tools or additional grips, reflecting their focus on delivering the core firearm without accessory markup. The moon clip enables rapid reloading but requires separate acquisition of compatible speed loaders for practical use.
Is the Smith & Wesson Model 640 worth it at $811.99?
At $811.99, the Model 640 justifies its price through proven durability and Smith & Wesson's lifetime service policy. Compared to polymer-framed alternatives costing $150-200 less, this revolver will maintain zero better and withstand decades of .357 Magnum use without frame fatigue. For shooters who prioritize mechanical longevity over minimal weight savings, this represents fair market value for a American-made defensive revolver.
Key attributes
| upc | 022188636901 |
| manufacturer | Smith & Wesson / S&W |
| manufacturer part number | 163690 |
| action | DAO Revolver |
| atf type | Revolver |
| barrel finish | Satin Stainless |
| barrel length | 2.2'' |
| caliber/gauge | .357 Magnum |
| capacity | 5 |
| color | Silver |
| length | 6.6'' |
| magazine included | 1 x 5-Round |
| model | 640 |
| package height | 2.4 |
| package width | 7.0 |
| product type | Revolver |
| safety | Internal Lock |
| shipping weight | 2.0 |
| sights | Blade Front/Fixed Rear |
| sights type | FIXED |
| state restriction (ca) | NO DIRECT SHIP TO CALIFORNIA |
| state restriction (guam) | NO SALE TO GUAM |
| state restriction (pr) | NO SALE TO PUERTO RICO |
| state restriction (vi) | NO SALE TO VIRGIN ISLANDS |
| units per box | 1 |
Frequently asked questions
- Is it compatible with aftermarket grips?
- Yes, the Model 640 uses standard J-frame grip patterns compatible with most major manufacturers including Hogue and Pachmayr. The factory grip measures 4.75 inches in circumference, but aftermarket options can reduce this to 4.25 inches for smaller hands. Installation requires only a single screwdriver and typically takes under 2 minutes.
- Does it fit standard J-frame holsters?
- Absolutely—the Model 640 shares dimensions with other Smith & Wesson J-frame revolvers including the Models 36, 60, and 642. Its 1.31-inch cylinder width and 6.31-inch length ensure compatibility with holsters from DeSantis, Galco, and Safariland. The enclosed hammer design eliminates snagging concerns in leather or Kydex retention systems.
- How long does shipping take to FFL dealers?
- We ship within 1 business day via FedEx Priority Overnight to ensure delivery within 2-3 business days nationwide. All firearms require shipment to your selected FFL dealer who must provide their license before processing. Once received, dealers typically require 24-48 hours for background check processing before release.
- Can I return it if it doesn't fit my hand?
- Firearms purchases are final once transferred through an FFL due to federal regulations, but we offer a 30-day exchange policy for unmodified firearms. If the grip circumference of 4.75 inches proves unsuitable, we recommend trying aftermarket options from Hogue or Pachmayr before considering exchange. All returns require prior authorization and original packaging.