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S&W M&P340 J-Frame .357 Mag 1.875″ 5-Rd Revolver, No Lock

UPC: 022188030723

$925.99

3 in stock

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Description

The Smith & Wesson M&P340 is a five-shot J-frame built for people who want serious firepower in the smallest package possible. It's a modern take on the classic Centennial AirLite design, chambered in .357 Magnum and also happy running .38 Special and .38 +P. The big story here is the scandium alloy frame mated to a PVD-finished stainless steel cylinder. That combination keeps the gun down around 13.3 ounces empty while still being tough enough to handle full-power magnum loads, something an aluminum frame simply can't do for long.

What Sets the M&P340 Apart From a Standard J-Frame

Two features really define this one. First is the enclosed, snag-free hammer, which means there's nothing to catch on a pocket lining or shirt hem when you draw. It's double-action only, so the trigger pull is the same every time. Second is the XS Sights 24/7 tritium night front sight paired with an integral U-notch rear. That glowing front dot is a genuine upgrade over the plain ramp sights most snubbies ship with, and it makes a real difference picking up the gun fast in low light. This particular model also comes without the internal lock, which is a popular choice among folks who prefer the cleaner, simpler frame.

Living With the M&P340 in the Real World

Let's be straight about recoil. A 13-ounce .357 Magnum is going to let you know it went off, and full-house 158-grain loads are stout. Most people who carry one shoot .38 +P or lighter 125-grain magnum loads for practice and defense, which keeps things controllable and follow-up shots fast. The beauty is that you carry it constantly and barely notice it's there, whether it's a pocket holster, an ankle rig, or a jacket pocket on a morning walk.

This is a carry gun first and foremost, ideal as a primary concealed piece, a backup, or an off-duty option. If you want maximum power in a revolver you'll actually have on you every day, the M&P340 earns its keep.

Key Specifications

  • Manufacturer: Smith & Wesson
  • Model: M&P340
  • Manufacturer Part Number: 103072
  • UPC: 022188030723
  • Caliber: .357 Magnum / .38 Special +P
  • Action: Double Action Only
  • Capacity: 5 Rounds
  • Barrel Length: 1.875"
  • Overall Length: 6.31"
  • Weight: 13.3 oz (empty)
  • Frame Material: Scandium Alloy
  • Cylinder: PVD-Finished Stainless Steel
  • Finish: Matte Black
  • Front Sight: XS Sights 24/7 Tritium Night Sight
  • Rear Sight: Integral U-Notch
  • Safety: No Internal Lock
  • Hammer: Enclosed / Snag-Free
  • Grips: Black Synthetic

Frequently Asked Questions

Can the M&P340 shoot .38 Special as well as .357 Magnum?

Yes. The M&P340 is chambered in .357 Magnum, which means it will also safely fire .38 Special and .38 Special +P loads. Many owners practice with .38 ammo since it's softer shooting and cheaper, then carry it loaded with a defensive magnum or +P round. Because it has a steel cylinder rather than titanium, it isn't restricted to heavier bullet weights the way the 340PD is.

Is the recoil really that bad?

Full-power 158-grain .357 Magnum loads are genuinely stout out of a 13-ounce gun, and most people don't enjoy long range sessions with them. The smart move is practicing with .38 +P or lighter 125-grain magnum loads, which keep recoil manageable and follow-up shots quick. A set of cushioned aftermarket grips like a Hogue Tamer can also tame things considerably for those who find it punishing.

What does "no internal lock" mean on this model?

Some S&W revolvers include a small key-operated lock above the cylinder release that can disable the gun. This version omits that feature entirely, leaving a cleaner frame. It's a popular preference among folks who like the simpler look and want one less mechanical part in the design.

Why is the hammer enclosed instead of exposed?

The enclosed, snag-free hammer is one of the defining traits of the Centennial-style J-frame. With no hammer spur sticking out, there's nothing to catch on clothing, a pocket lining, or a holster when you draw. The tradeoff is that it's double-action only, so you can't cock it for a single-action shot, but for a defensive carry gun that's exactly what most people want.

Is the M&P340 a good gun for a first-time shooter?

It's a fantastic carry gun but not the easiest starter revolver. The lightweight frame, snappy recoil with magnum loads, and a double-action trigger pull around 12 pounds all demand practice to shoot well. New shooters are often better served learning on a heavier steel-frame revolver first, then graduating to a lightweight scandium gun like this one once their fundamentals are solid.

What sights does it come with?

It ships with an XS Sights 24/7 tritium night front sight paired with an integral U-notch rear. The glowing tritium front dot makes the gun much faster to aim in low light than a plain black ramp, which is a meaningful upgrade on a defensive snub-nose. It's one of the features that helps justify the M&P340's price over a basic Airweight.

Additional information

UPC

022188030723

Manufacturer

Manufacturer Part Number

103072

Action

ATF Type

Revolver

Barrel Finish

MATTE BLACK

Barrel Length

1.875''

Caliber/Gauge

.357 Magnum

Capacity

5

Color

Black

Length

6.31''

Magazine Included

Cylinder

Model

Package Height

2.4

Package Width

7.0

Product Type

Double Action Only

Safety

No Internal Lock

Shipping Weight

1.5

Sights

XS Sights 24/7 Night Front, Integral U-Notch Rear

Sights Type

Night Sights

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

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