Smith & Wesson Model 940-3 9mm J-Frame Snub Revolver

Description

Want a 9mm Revolver That Disappears in a Pocket?

There’s a specific kind of carry gun that doesn’t get enough attention: the snub-nosed revolver. It doesn’t have a 17-round magazine, it doesn’t have a red dot, and it doesn’t have a compensator. What it has is simplicity. You draw, you pull the trigger, it fires. No manual safety to disengage, no slide to rack under stress, no magazine seating to confirm. The Smith & Wesson Model 940-3 brings this philosophy to 2026 with a J-Frame 9mm that runs moon clips, weighs 14.4 oz, and fits inside a front pocket with room to spare.

Quick Answer

The S&W Model 940-3 is a DAO 9mm Luger J-Frame snub revolver with a 1.875″ barrel, 5-shot capacity, concealed hammer (snag-free), moon-clip compatible cylinder, textured synthetic grip, matte black finish, ~14.4 oz unloaded, ~6.3″ OAL, ~1.3″ width. Returns to S&W’s catalog in 2026 after a long absence. Sale price: $791.12.

What Makes the Model 940-3 Stand Out

Smith & Wesson’s J-Frame is the most refined small revolver platform in American production history. The company has been making J-Frames since 1950, and the dimensional engineering of this frame — how it fits in a hand, how it rides in a pocket holster, how it presents for a draw — reflects seven decades of refinement. The 940-3 sits on that foundation with a specific caliber twist: it chambers 9mm Luger rather than the traditional .38 Special or .357 Magnum you’d expect in a J-Frame snub.

Why 9mm in a revolver? Ammunition commonality. If you carry a 9mm semi-auto as your primary gun — and the majority of defensive handgun carriers do in 2026 — you can now run the same ammunition in your backup revolver. One caliber to buy, one recoil pattern to train, one type of ammunition to keep in stock. The Model 940-3’s cylinder is moon-clip compatible, which solves the headspace challenge that comes with running a rimless cartridge in a revolver. Moon clips also speed reloading significantly — instead of feeding cartridges one by one, you load all five rounds simultaneously in about two seconds.

The concealed hammer is the detail that makes this a true EDC tool. External hammers on snub revolvers catch on clothing during a draw — fabric, a jacket lining, a pocket seam. A concealed (fully internal) hammer eliminates that problem. The double-action-only trigger pull is the only way to fire the gun, which also means there’s no accidental cocking in a pocket holster. The tradeoff is a heavier, longer trigger pull — typically 10–12 lbs on a J-Frame DAO — which takes more finger strength and practice to shoot accurately, but is widely accepted as the right balance for a close-range defensive pocket gun.

At 14.4 oz unloaded and 1.3″ wide, the 940-3 is genuinely pocketable in cargo pants, a jacket pocket, or a quality pocket holster in larger jeans. The 6.3″ overall length keeps it shorter than most compact semi-autos. If you’re comparing it to a micro-compact like the Taurus GX4 XL 9mm, the revolver is slightly thicker but shorter front-to-back, and it doesn’t have a slide that can catch fabric during a pocket draw. Different compromises for different carry styles.

The matte black finish reduces light signature. The textured synthetic grip fills the hand adequately for 5-round defensive use — it’s not a target grip, and it’s not meant to be. The low-profile fixed sights are appropriate for a defensive snub at the ranges where this gun would actually be used: under 10 yards. You’re not punching paper at 25 yards with this revolver. You’re carrying it every day so it’s there when you need it.

S&W brought the 940-3 back to catalog in 2026 after a long absence from production. Original Model 940 revolvers from the early 1990s appear regularly on the used market, but getting a new-production example with a warranty is a different proposition. For buyers who want the dependability of a new-production S&W J-Frame with the 9mm caliber advantage, the timing of this reintroduction is well-placed.

Specifications

Spec	Detail
Caliber	9mm Luger
Action	Double-action only (DAO)
Frame	J-Frame Small
Barrel Length	1.875″
Overall Length	~6.3″
Width	~1.3″
Weight (Unloaded)	~14.4 oz
Capacity	5-shot
Hammer	Concealed (snag-free)
Sights	Low-profile fixed
Grip	Textured synthetic
Finish	Matte black
Safety	None (DAO trigger only)
Moon Clips	Compatible (required for 9mm headspace)
Sale Price	$791.12
Catalog Return	2026 (original release early 1990s)

How It Compares

The Chiappa Rhino 60DS 10mm represents the opposite end of the revolver design philosophy — a 6″ barrel, 10mm chambering, 6-shot capacity, and a barrel that fires from the bottom cylinder rather than the top. The Rhino is a full-size revolver designed for range use and power. The S&W 940-3 is a pocket-sized 9mm with 5 rounds and minimal mass. They share the revolver action type but serve completely different roles. For more revolver options at different points on the size spectrum, the Colt Anaconda .44 Magnum and the Henry Deadeye .357 Magnum are also in stock at White’s Arms.

Honest Pros and Cons

Pros:

The concealed hammer and DAO-only action makes this the most pocket-carry friendly revolver configuration available — no external parts to snag on clothing during a draw. Running 9mm Luger means ammunition commonality with the most popular defensive pistol caliber in the U.S. Moon clips enable fast reloads and solve rimless cartridge headspace completely. New-production S&W J-Frames come with the factory warranty and quality control of current production — not a used gun with unknown round count.

Cons:

Five rounds is all you get without a reload — that’s a real capacity limitation compared to a micro-compact semi-auto that runs 10–15 rounds. The DAO trigger pull of approximately 10–12 lbs requires consistent dry-fire practice to shoot accurately; new shooters often find J-Frame snubs harder to shoot well than a semi-auto with a lighter, shorter reset. Moon clips are required to properly headspace 9mm — carry spares and don’t lose them at the range.

Frequently Asked Questions

Do you need moon clips to shoot the S&W Model 940-3?

Yes. The 9mm Luger cartridge is rimless, so without moon clips, the cartridge has no rim to headspace against the cylinder’s rear face. Moon clips position all five rounds correctly and allow the extractor star to eject them reliably. You can’t reliably fire the 940-3 without moon clips. Buy at least three or four sets to rotate through — they’re inexpensive and widely available online.

Is the Model 940-3 suitable for a new shooter?

With good instruction, yes. Revolvers are mechanically simpler to operate than semi-autos — no slide, no decocker, no magazine to seat. The complexity for new shooters is the heavier DAO trigger pull, which requires trigger discipline to manage accuracy. We recommend dry-fire practice with snap caps before your first live-fire session. We’re happy to walk you through it here at White’s Arms.

Will .38 Special or .357 Magnum ammunition work in the Model 940-3?

No. The 940-3 is chambered exclusively in 9mm Luger. The cylinder dimensions are cut for 9mm cartridges with moon clips. Do not attempt to chamber .38 Special or any other cartridge — it will not headspace correctly and creates a dangerous condition.

How does the 940-3 compare to a micro-compact semi-auto for everyday carry?

Micro-compact semi-autos like the Springfield Armory Hellcat typically offer more rounds (10+1 or higher), a lighter trigger pull, and faster follow-up shots. The 940-3 offers a simpler manual of arms, no slide to rack, and a shorter front-to-back profile that can work better in pocket carry. It comes down to whether your priority is capacity or simplicity. For many experienced carriers, both have a place in the rotation.

Where can I find moon clips for the 940-3?

Moon clips for 9mm J-Frame revolvers are available from TK Custom, Dade Machine, and several other suppliers online. Verify the model number match before ordering — J-Frame moon clips are cylinder-specific. We can also help source accessories at White’s Arms; ask us when you pick up the revolver.

Add the 940-3 to Your EDC Rotation

The S&W Model 940-3 is in stock now at White’s Arms in Salt Lake City for $791.12. It’s a no-drama 9mm pocket revolver from the most trusted American revolver manufacturer — and it’s back in production after a long break. If you’re building out a revolver collection, browse all revolvers in our catalog. For comparison against full-size semi-autos in 9mm, check the Taurus TX9 Full-Size or the full handguns category. We love talking through EDC options — stop in or call us anytime.

Last updated: March 2026. Specs sourced from Smith & Wesson manufacturer documentation. Model 940-3 reintroduced to S&W catalog February 2026.