S&W Model 638 Airweight .38 Special 1.875″ 5-Round
Video review
Expert review
About this product
What is the S&W Model 638 Airweight .38 Special? The Smith & Wesson Model 638 is a J-Frame, double/single action revolver with a shrouded hammer built for discreet personal carry over long durations. Its Airweight design prioritizes a 15.1-ounce loaded carry weight, achieved through an aluminum alloy frame paired with a stainless steel barrel and cylinder. This combination is the direct result of S&W's engineering for the concealed carry permit holder who demands reliability without excessive bulk.
What is the S&W Model 638 Airweight used for?
The S&W Model 638 is a dedicated concealed carry revolver, optimized for all-day comfort in a pocket or inside-the-waistband holster. Its 1.875-inch barrel and 6.31-inch overall length create a compact footprint, while the shrouded hammer completely eliminates snagging on clothing during a rapid draw. This pistol is intended for defensive engagement at distances under 25 yards, where its fixed sights and predictable double-action trigger pull provide consistent point-of-aim performance.
How does the S&W Model 638 compare to the Stevens 334 Rifle?
The S&W Model 638 and the Stevens 334 Rifle in .308 Win serve entirely different purposes; the 638 is a close-quarters defensive tool, while the 334 is a precision medium-game hunting platform. The 638's 5-round cylinder and 15.1-ounce weight make it a true carry piece, whereas the 334's 20-inch barrel and rifle cartridge are built for accurate shots beyond 100 yards. The 638 is better for discreet personal protection, while the 334 is superior for ethical harvests at range.
What does it weigh and what are the dimensions?
The Model 638 weighs 15.1 ounces with an empty cylinder, which increases to approximately 18.2 ounces when loaded with five rounds of standard 130-grain .38 Special ammunition. Its critical dimensions are a 1.875-inch barrel length, a 6.31-inch overall length, and a cylinder width of 1.285 inches. These figures translate to a revolver that fits into a front jeans pocket holster measuring 7.5 inches in height and 1.5 inches in width, making it one of the most packable centerfire options available.
Who is this NOT for?
This revolver is not for the shooter seeking a high-capacity, optics-ready platform for competition or duty use. Its 5-round capacity is a functional limitation for extended engagements, and its fixed sights cannot be upgraded with night tritium inserts without significant gunsmithing. If your primary use case involves precision target shooting, consider a dedicated .22 LR revolver or a semi-automatic pistol like those in our competition pistol guide.
What's in the box?
This pistol ships from the distributor with the revolver itself, one synthetic black grip panel installed, a factory-installed internal lock (deactivated with its provided key), and a single 5-round stainless steel cylinder. You will not find a cleaning kit, a spare grip, or a holster included. Ironclad Armory ships all firearms in a compliant, locked hard case with necessary paperwork, but the factory contents remain standard Smith & Wesson issue.
Is the S&W Model 638 worth it at $537.99?
At $537.99, the Model 638 represents fair value for a proven, American-made J-Frame with no-frills reliability. You are paying for S&W's forged internal components and the corrosion resistance of its stainless steel barrel, which is a tangible step above budget-priced alloy revolvers that often use molded MIM parts. For a shooter who needs a dependable, snag-free carry gun that will last for decades with basic maintenance, this price point is justified by its material construction and mechanical pedigree.
Specs at a glance
Pros & cons
What works
- Weighs 15.1 oz unloaded — 32% lighter than an all-steel J-Frame
- 1.875-inch barrel yields a 6.31-inch OAL for deep concealment
- Shrouded hammer eliminates 100% of external snag points
- Stainless steel cylinder and barrel provide corrosion resistance without added weight
Trade-offs
- 5-round capacity is a functional limitation for any scenario beyond initial engagement
- Fixed sights are non-adjustable and low-profile, challenging in low light
- Internal lock mechanism adds a potential failure point disliked by purists
- Aluminum alloy frame limits extended use of +P ammunition to under 500 rounds lifetime
Key attributes
| upc | 022188630701 |
| manufacturer | Smith & Wesson / S&W |
| manufacturer part number | 163070 |
| action | SA/DA Revolver |
| atf type | Revolver |
| barrel finish | STAINLESS |
| barrel length | 1.875'' |
| caliber/gauge | .38 Special |
| capacity | 5 |
| color | Silver |
| length | 6.31'' |
| magazine included | 1 x 5-Round |
| model | 638 |
| package height | 2.4 |
| package width | 7.0 |
| product type | Revolver |
| safety | Internal Lock |
| shipping weight | 1.7 |
| sights | Integral Front/Fixed Rear |
| sights type | FIXED |
| 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
- Does this work with Safariland ALS holsters?
- Yes, the Model 638 is compatible with many shrouded-hammer J-Frame holsters, but not the standard ALS paddle system designed for semi-automatics. You will need a specific J-Frame model like the Safariland 568 or a custom Kydex holster from a vendor like JM Custom Kydex, which typically has a 3-5 week lead time for made-to-order items.
- Is it compatible with +P .38 Special ammunition?
- Yes, the Model 638 is rated for limited use of +P ammunition according to Smith & Wesson's manual. The steel cylinder and barrel can handle the increased pressure, but the aluminum frame will experience accelerated wear. I recommend a maximum of 500 rounds of +P through the firearm's lifetime to preserve the frame's integrity.
- Can I install a Crimson Trace laser grip?
- Yes, the Model 638 accepts standard J-Frame round-butt grip panels. Crimson Trace models like the LG-305 are a direct fit and install in under 2 minutes with a Phillips head screwdriver. Ensure you purchase the version for enclosed-hammer J-Frames to maintain the shroud's functionality.
- How long does shipping to an FFL take?
- Ironclad Armory processes in-stock items like the Model 638 within 1 business day. Ground shipping via UPS or FedEx to a certified FFL dealer typically adds 3-5 business days for transit. Total time from order to your FFL's notification is usually 5-7 business days, barring no local regulatory delays.