Smith & Wesson Model 648 22 WMR 6-inch 8-Round Stainless

The Smith & Wesson Model 648 22 WMR 6-inch 8-Round Stainless is a K-frame revolver built from solid stainless steel, chambered in .22 Winchester Magnum Rimfire for precision target work and small-game hunting. This all-stainless wheelgun features an 8-round cylinder and a full-underlug barrel, delivering the kind of rugged reliability and accuracy that serious shooters and collectors demand. According to Smith & Wesson specs, this revolver operates in both double- and single-action modes, with an adjustable rear sight for fine-tuning your point of impact.

Manufacturer	Smith & Wesson
Model	648
Material	Stainless steel (frame, barrel, cylinder)
Compatibility	.22 WMR ammunition
Finish	Satin stainless
Weight	Approx. 40 oz (per manufacturer specs)
Condition	New

Key Features

• Full-Underlug 6-Inch Barrel – Adds weight forward to reduce muzzle flip and dampen recoil, giving you steadier follow-up shots during rapid fire or field use.
• 8-Round Cylinder – Holds two more rounds than standard .22 Magnum revolvers, meaning fewer reloads on the range or in the field.
• Adjustable Rear Sight – Lets you dial in elevation and windage precisely, so you can print tight groups at 25 or 50 yards.
• Synthetic Finger-Groove Grips – Provide a secure, repeatable hand position even with wet or gloved hands, reducing fatigue during extended shooting sessions.
• Double/Single Action Trigger – Gives you the option of a smooth, heavy DA pull for fast work or a crisp, light SA pull for accurate slow-fire.

Who It’s For

This revolver is built for the handgun hunter who wants a rimfire magnum that can drop squirrels and rabbits cleanly, the target shooter who demands consistent accuracy from a fixed-barrel platform, and the collector who appreciates a modern stainless K-frame that’s becoming harder to find. If you’ve ever run a box of .22 WMR through a 6-inch barrel and felt that satisfying crack and flat trajectory, you already know why the Model 648 belongs in your safe.

Pros & Cons

• PRO: All-stainless construction means zero rust worries in humid climates or light rain—just wipe it down after a muddy hunt.
• PRO: The K-frame size balances perfectly in hand; it’s not a bulky N-frame but still has enough heft for steady offhand shooting.
• CON: The factory trigger pull in double-action averages around 12 pounds, which may feel heavy for shooters used to tuned competition revolvers—a spring kit can lighten it.
• CON: .22 WMR ammunition costs roughly double what .22 LR costs, so plinking sessions will hit the wallet harder than a standard rimfire revolver.

Comparison vs. Competitors

Feature	Smith & Wesson Model 648	Ruger Single-Six .22 WMR	Colt King Cobra Target .22
Frame Material	Stainless steel	Stainless steel	Stainless steel
Barrel Length	6 in. (full underlug)	6.5 in.	4.25 in.
Capacity	8 rounds	6 rounds	8 rounds
Action Type	DA/SA	SA only	DA/SA
Weight (approx.)	40 oz	35 oz	34 oz
Street Price	$866	$759	$949

The Ruger Single-Six is a classic single-action with a longer barrel, but you lose the ability to fire double-action and you’re stuck with a six-round cylinder. The Colt King Cobra Target offers DA/SA and 8 rounds but has a shorter 4.25-inch barrel and costs about $80 more. The Model 648 splits the difference—full underlug for balance, 8 rounds, and a price point that undercuts the Colt.

FAQ

What is the cylinder capacity of the Smith & Wesson Model 648?

The Model 648 holds 8 rounds of .22 WMR in its stainless cylinder. That’s two more than most rimfire magnum revolvers, giving you a higher ammo capacity for target strings or hunting.

Does this revolver have adjustable sights?

Yes. The rear sight is fully adjustable for windage and elevation, and the front is a red ramp blade. This allows you to zero the revolver precisely at different distances.

Can I shoot .22 Long Rifle out of the Model 648?

No. The Model 648 is chambered exclusively for .22 Winchester Magnum Rimfire (.22 WMR). Firing .22 LR in a .22 WMR chamber can cause unsafe pressure spikes and damage the revolver. Stick to .22 WMR only.

What is the barrel length on the Model 648?

The barrel is 6 inches long with a full underlug profile, which adds weight forward for reduced muzzle rise and improved accuracy potential.

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Explore more wheelguns in our Revolvers collection, check out Smith & Wesson offerings, or browse Rimfire Handguns for other .22 options.

Last updated: April 2026