The SIG Sauer SP2340—also known as the Sig Pro 2340, Sig 2340, or simply SP2340—is a full-size polymer-framed DA/SA service pistol chambered in .40 S&W or .357 SIG. It features a 3.9-inch barrel, stainless steel Nitron-coated slide, interchangeable grip panels, and a classic SIG decocking system.
With an unloaded weight around 29–30 ounces, a 7.4-inch overall length, and a 10+1 capacity in .40 S&W, the SP2340 blends the reliability of SIG’s metal-frame classics with the lighter weight and durability of polymer design.
Created as part of SIG’s first-generation polymer SIG Pro series, the SP2340 established the foundation for later models like the SP2009 and SP2022.
Why Does the SIG Sauer SP2340 Remain an Important Part of SIG’s History?
The SIG Sauer SP2340 matters because it was the first step in SIG’s transition from all-metal duty pistols to modern polymer-framed service guns.
This pistol introduced the ergonomics, DA/SA mechanics, and reliability SIG fans prize, but at a lighter weight and more affordable price point. It remains relevant for collectors, DA/SA enthusiasts, and shooters who want early-2000s SIG engineering in a duty-sized package.
SIG Sauer, headquartered in the U.S. with roots in Germany and Switzerland, developed the SIG Pro line to compete with emerging polymer duty pistols like the Glock 22 and HK USP .40. The SP2340 was designed primarily around .40 S&W and .357 SIG—calibers popular with law enforcement in that era.
Unlike the later SP2022, the SP2340 is now fully discontinued, making it highly interesting for collectors seeking early polymer SIG history or shooters who prefer the DA/SA system.
Its intended market includes law enforcement, home defense buyers, and shooters who want a precise, durable alternative to striker-fired polymer pistols.
What Are the Specifications of the SIG Sauer SP2340?
The SP2340 pistol is a full-size DA/SA handgun chambered in .40 S&W or .357 SIG, featuring a 3.9-inch barrel, polymer frame, and SIG’s reliable decocker-only system. Its dimensions place it between the P226 and P229 in overall profile.
Core Specs
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Caliber: .40 S&W (primary), .357 SIG (variant)
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Action: Traditional double-action/single-action (DA/SA)
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Barrel Length: ~3.9 inches
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Overall Length: ~7.4 inches
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Height: ~5.7 inches
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Width: 1.4–1.5 inches
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Unloaded Weight: ~29–30 oz
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Slide Material: Stainless steel with Nitron finish
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Frame Material: Polymer with interchangeable grip panels
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Magazine Capacity: Generally 10+1 for .40 S&W; varies by region
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Rail: M1913 Picatinny rail molded into the frame
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Sights: Contrast or night sights depending on SKU
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Safeties: Firing-pin block, decocker, hammer intercept notch
Other Notable Features
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Four-point safety system
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Takedown lever identical to classic SIGs
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Early polymer construction but with “real SIG” feel
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Available in DA/SA or limited DAO configurations
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Compatibility with many P-series firing control principles
How Is the Design and Build Quality of the Sig Pro 2340?
The SIG SP2340 combines a stainless steel slide with a polymer frame built for duty use, delivering a rugged and dependable structure. Its materials and fitment feel closer to SIG’s metal-framed classics than to most early polymer pistols.
Frame & Slide Materials
The polymer frame remains sturdy, with interchangeable grip panels allowing shooters to tailor palm swell and reach. The stainless Nitron-coated slide provides corrosion resistance, wear protection, and long-term durability expected from SIG pistols of this era.
Ergonomics
Shooters consistently praise the Sig Pro 2340 for a grip that feels slimmer and more natural than many other .40-caliber duty pistols from the early 2000s. The angle, texturing, and width give the SP2340 excellent control for medium and large hands.
Grip Texture & Angle
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The grip panels provide solid traction without excess abrasion.
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The palm swell inserts allow moderate customization.
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The bore axis is slightly higher than striker-fired competitors but is typical of DA/SA SIGs.
Controls
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Decocker: Classic SIG placement
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Slide Stop: Positive engagement, easy to reach
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Mag Release: Crisp and reversible
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Trigger:
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DA: Smooth but heavy (~10–11 lbs)
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SA: Very crisp (~4.5–5 lbs)
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Accessory Compatibility
The built-in Picatinny rail accepts most full-size weapon lights or lasers, making the SP2340 viable for modern home-defense setups. It does not come optics-ready, as it predates the modern slide-cut era.
What Variants of the SIG SP2340 Exist?
There are only a few direct variants of the SP2340, mainly related to chambering and contract specifics. This simplicity makes the pistol easier to identify and collect.
SP2340 Variants
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SP2340 (.40 S&W) – Most common variant
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SP2340 (.357 SIG) – Less common, more recoil, higher velocity
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Night-sight models – Equipped with SIGLITE sights
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DAO models – Limited availability, mainly European
Feature Differences
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Some models include loaded chamber indicators
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Some contract models include unique roll marks or serial prefix patterns
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Rail style and grip panel textures vary slightly by year
Generational Notes
The SP2340 predates the SP2009 and SP2022 and shares many design cues with the early SIG Pro prototypes. Production ended long before the P320 era, so availability is entirely through used markets.
Comparison to Similar Pistols
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SIG P226: Heavier, metal-frame, more expensive
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SIG SP2022: Improved polymer successor with stronger aftermarket support
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HK USP .40: Comparable performance but bulkier
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Glock 22: Lighter, simpler, striker-fired alternative
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CZ P-07: Modern polymer DA/SA equivalent
Across comparisons, the Sig Pro 2340 remains respected for combining classic SIG reliability with early polymer innovation.
How Does the SIG Sauer SP2340 Perform in Real Use?
The SP2340 delivers reliable, accurate, and controllable performance—especially considering its age and discontinued status. Shooters describe it as a soft-shooting .40-caliber pistol with predictable DA/SA behavior.
Accuracy
The SP2340 is widely regarded as “combat accurate,” capable of producing tight groups at defensive ranges. Its crisp single-action break supports precision shooting.
Recoil Management
Despite firing .40 S&W or .357 SIG, the SP2340’s weight and grip design tame recoil effectively. Shooters report that it is smoother than many polymer .40s from the same era.
Reliability
Reliability is a major strength. Many owners report thousands of rounds without noteworthy malfunctions. It feeds JHP and FMJ reliably when using factory magazines.
Trigger Feel
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DA: Long and heavy but smooth
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SA: Clean wall and crisp break
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Reset: Tactile and short enough for controlled rapid fire
What Ammunition Works Best in the Sig Pro 2340?
The SP2340 reliably cycles standard and defense-grade ammunition in .40 S&W and .357 SIG. Its chamber supports a wide range of bullet shapes.
Best Loads
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Practice: 165–180 gr FMJ for .40 S&W
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Defense: 165–180 gr JHP
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.357 SIG: 125-gr JHP or FMJ loads
Known Issues
There are no widespread reports of feeding or extraction issues. Ammunition sensitivity is minimal, and maintenance consistency matters more than ammo brand.
Is the SIG SP2340 Good for Concealed Carry?
The SP2340 can be concealed with the right holster, but its height and weight make it more suitable for open carry or winter concealment.
Is It Suitable for Home Defense?
Yes. Its DA/SA system, rail, weight, and low recoil make it an excellent home-defense pistol.
Does It Work Well for Competition?
It can be used in IDPA or USPSA divisions, though its heavy DA first shot makes it less competitive compared to modern striker-fired guns.
Is It Suitable for Outdoors or Hunting?
For hikers, ranchers, and woods carriers, the SP2340 offers durability and reliable performance, especially in .357 SIG.
Is It a Range Toy or a Workhorse?
It is a workhorse—durable, reliable, and built to last, while also enjoyable for range sessions.
What Are the Best SIG SP2340 Holster Options?
A SIG SP2340 holster should provide stable retention and accommodate the pistol’s profile. Below are options that support daily carry, training, and specialized use.
Cloak Tuck 3.5 IWB Holster
This inside-the-waistband SIG SP2340 holster provides deep concealment and excellent comfort. Its flexible backing distributes weight, making the full-size gun easier to carry.
Belt Holster
A belt-mounted SP2340 holster offers a firm, secure platform for open carry. It provides great stability and fast access during training.
OWB Paddle Holster
This paddle-style SIG SP2340 holster allows quick on/off attachment. It’s ideal for range use or open carry environments.
Swivel Drop Leg Holster
A drop-leg SP2340 holster positions the pistol lower on the thigh, supporting tactical-style draws. The swivel feature helps maintain mobility while wearing gear.
Chest Holster
A chest-mounted Sig 2340 holster is ideal for hikers, ATV riders, and outdoor users needing clear access above backpacks or jackets.
Hook & Loop Holster
This SP2340 holster attaches inside bags, vehicle consoles, or modular panels using hook-and-loop surfaces. It allows staged defensive access.
What Are the Strengths and Weaknesses of the SIG SP2340?
Pros
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Extremely reliable and durable
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Better recoil control than many .40-caliber polymers
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Excellent DA/SA single-action trigger quality
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Interchangeable grips for ergonomic adjustment
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Full accessory rail for lights/lasers
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Strong accuracy for a duty pistol
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Affordable on the used market
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Has collector appeal as an early polymer SIG
Cons
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Fully discontinued; parts may become harder to source
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Heavier and bulkier than modern .40-caliber pistols
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Limited aftermarket support
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DA/SA transition requires training
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No optics-ready options
Should You Buy the SIG Sauer SP2340?
The SIG SP2340 is one of the most undervalued DA/SA pistols in SIG Sauer’s historical lineup. For shooters who love the traditional SIG manual of arms—decocker, DA first pull, crisp SA break—the SP2340 offers that classic handling at a fraction of the cost of P226 or P229 models. Its reliability record, strong ergonomics, and excellent recoil management make it a trustworthy choice for home defense, duty use, or recreational shooting.
For collectors, the SP2340 is particularly appealing because it represents the beginning of SIG’s polymer era. As the SP2340 continues to grow scarce due to its discontinued status, well-maintained examples may become increasingly desirable.
For practical users, the SP2340 remains a workhorse—accurate, soft-shooting, and exceptionally durable. While its DA/SA mechanics require practice and aftermarket support is limited, the pistol’s performance-to-price ratio is outstanding on the used market.
If you want a solid hammer-fired duty pistol, a reliable home-defense gun, or a piece of SIG Sauer history, the SIG Sauer SP2340 is absolutely worth owning.