Description
The Viper name has been off Colt's roster since the late 1970s, and its return slots neatly into the modern snake gun lineup between the Cobra and the King Cobra. This version wears a 4.25 inch barrel, and the half-lug profile is the detail that sets it apart. By trimming steel from under the barrel, Colt shaved weight off the front end, so the gun comes in at 28.5 ounces unloaded and points noticeably quicker than a full-lug revolver of the same size. It swings between targets fast, sits comfortably in a belt holster all day, and still has enough steel in the frame to keep .357 Magnum recoil civilized.
What Makes This Viper Worth a Look
The frame, barrel, and cylinder are all forged stainless steel, and the one-piece barrel gets a recessed target crown to protect the rifling. Sights are a pinned black ramp up front with a U-notch rear cut into the top strap, a simple fixed setup with nothing to snag or knock out of alignment. The front sight is held by a screw at the muzzle, so swapping to a different height or style down the road is easy. The double action pull runs smooth in the 7 to 9.5 pound range, and the single action break is crisp, the kind of trigger work that has earned Colt's second-generation revolvers a strong reputation. The checkered American walnut grips are a nod to the original Viper, extend below the frame for a full purchase, and lock your hand in place when the magnum loads start barking.
Feeding the Colt Viper
The six-round cylinder handles full-house .357 Magnum and also runs .38 Special, which keeps range days affordable and recoil-friendly. Practice with .38s, carry or hunt with magnums, and let the 4.25 inch tube wring useful velocity out of both. Whether you want one wheelgun that covers home defense, woods carry, and weekend plinking, this Viper is built to do all of it without fuss.
Key Specifications
- Manufacturer: Colt
- Model: Viper
- MPN: VIPER-SP4WRR
- UPC: 098289001412
- Caliber: .357 Magnum (also fires .38 Special)
- Capacity: 6 Rounds
- Action: Double Action / Single Action
- Barrel Length: 4.25"
- Barrel: One-piece, half-lug, recessed target crown, 1:14 LH 6-groove
- Frame Material: Forged Stainless Steel
- Finish: Stainless
- Front Sight: Black Ramp
- Rear Sight: Fixed U-Notch
- Grips: Checkered American Walnut
- Overall Length: 9.25"
- Unloaded Weight: 28.5 oz
What’s Included
- Colt Viper revolver
- Colt hard case with padded interior
- Owner's manual
- Cable-style safety lock
Frequently Asked Questions
Can the Colt Viper shoot .38 Special ammo?
Yes. Since .38 Special is the parent case of the .357 Magnum, the Viper runs both interchangeably, including .38 Special +P. A lot of owners practice with softer-shooting .38s and load magnums for defense or field use, which keeps range time cheap and pleasant.
How does the Viper differ from the Colt King Cobra?
They share the same modern Colt frame and internals, but the Viper trades the King Cobra's rubber grips for checkered walnut and uses a half-lug barrel instead of a full underlug. That trims weight off the muzzle end, so it carries lighter and points faster. Think of it as the more traditional, carry-oriented take on the same platform.
Is a 28.5 ounce revolver manageable with full-power .357 Magnum loads?
It is. The all-steel construction and the walnut grips that extend below the frame give you plenty to hang onto, and the 4.25 inch barrel tames muzzle blast better than snub-length guns. Recoil with magnums is stout but controllable, and with .38 Special it is downright mild.
Are the sights on the Colt Viper adjustable?
The rear U-notch is fixed, machined right into the top strap, so there is nothing to break or drift out of place. The black ramp front sight is retained by a small screw at the muzzle, which makes it simple to swap for a different height or style if you shoot heavier bullets or want a brass bead. Most factory 158 grain loads print close to point of aim as it comes.





Reviews
There are no reviews yet.