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S&W Sigma 40: A Comprehensive Review of Smith & Wesson’s Polymer Pistol

The Smith & Wesson Sigma 40, often referred to as the S&W Sigma 40, is a polymer-framed, semi-automatic pistol chambered in .40 S&W. Introduced in the mid-1990s, the Sigma series was Smith & Wesson’s entry into the polymer pistol market, directly competing with the Glock series. While the Sigma line has been discontinued, understanding its history, features, and performance provides valuable insights into the evolution of modern handguns. This review offers a detailed look at the S&W Sigma 40, exploring its design, functionality, and place in the firearms landscape.

History and Development of the S&W Sigma Series

The development of the S&W Sigma series was driven by the increasing popularity of polymer-framed pistols, particularly Glock. Smith & Wesson aimed to create a reliable and affordable alternative. The initial Sigma models, including the SW40F (full-size .40 S&W) and SW9F (full-size 9mm), drew heavily from Glock’s design, leading to a patent infringement lawsuit. This lawsuit resulted in a settlement and design changes to subsequent Sigma models. Despite the controversy, the Sigma series marked Smith & Wesson’s commitment to adapting to market trends and innovating in the polymer pistol category.

Design and Features of the S&W Sigma 40

The S&W Sigma 40 features a polymer frame and a stainless steel slide. Its design incorporates several notable features:

Polymer Frame: The polymer frame contributes to the pistol’s relatively light weight, making it comfortable for extended carry.
Stainless Steel Slide: The stainless steel slide enhances durability and corrosion resistance.
Striker-Fired Action: The striker-fired action provides a consistent trigger pull, though the Sigma’s trigger is often criticized for being heavy and having a long travel.
Fixed Sights: Most Sigma models come with fixed sights, typically three-dot sights for quick target acquisition.
Magazine Capacity: The standard magazine capacity for the S&W Sigma 40 is 14 rounds.
Ergonomics: The grip is designed to provide a comfortable and secure hold, although some users find it to be less ergonomic than other modern pistols.

Performance and Handling

The performance of the S&W Sigma 40 is generally considered adequate for its intended purpose as a self-defense firearm. However, it has faced criticism regarding its trigger and overall shooting experience.

Trigger

The trigger is a common point of contention among Sigma users. It is known for being heavy, with a long and gritty pull. This can affect accuracy, especially for inexperienced shooters. While some users have attempted to improve the trigger through aftermarket modifications, the stock trigger remains a significant drawback.

Accuracy

With practice, the S&W Sigma 40 can achieve acceptable accuracy for self-defense scenarios. However, the heavy trigger can make it challenging to maintain consistent shot placement. At typical self-defense distances (7-15 yards), the Sigma can deliver reasonably tight groupings, but it may require more effort compared to pistols with lighter and crisper triggers.

Reliability

The S&W Sigma 40 is generally considered to be reliable. It is a robust design that can withstand a significant amount of use without major issues. However, like any firearm, regular maintenance and proper cleaning are essential to ensure consistent performance. [See also: Guide to Cleaning Your Handgun]

Recoil

The .40 S&W cartridge is known for producing significant recoil, and the Sigma 40 is no exception. The recoil can be manageable with proper grip and shooting technique, but it may be uncomfortable for some shooters, particularly those new to the .40 S&W caliber.

Advantages and Disadvantages of the S&W Sigma 40

Like any firearm, the S&W Sigma 40 has its strengths and weaknesses. Understanding these can help potential buyers make an informed decision.

Advantages

Affordability: One of the main selling points of the Sigma series was its lower price point compared to other polymer pistols.
Reliability: The Sigma 40 is generally considered to be a reliable firearm.
Durability: The stainless steel slide and polymer frame contribute to the pistol’s overall durability.
Simple Design: The simple design makes it easy to disassemble and maintain.

Disadvantages

Heavy Trigger: The heavy and gritty trigger is the most common complaint.
Ergonomics: Some users find the grip to be less ergonomic than other modern pistols.
Limited Aftermarket Support: Compared to more popular pistols like the Glock or Smith & Wesson M&P, the Sigma has limited aftermarket support for accessories and upgrades.
Discontinued: The Sigma series has been discontinued, which may make it more difficult to find parts and accessories in the future.

Who is the S&W Sigma 40 For?

The S&W Sigma 40 is best suited for individuals looking for an affordable and reliable self-defense pistol. While its heavy trigger may be a drawback for some, it can be a viable option for those on a budget who are willing to put in the practice to master its trigger. It might also appeal to those who appreciate the simplicity and durability of its design.

Alternatives to the S&W Sigma 40

If the S&W Sigma 40 doesn’t quite fit your needs, there are several alternatives to consider:

Glock 22/23: The Glock 22 (full-size) and Glock 23 (compact) are popular .40 S&W pistols known for their reliability and extensive aftermarket support.
Smith & Wesson M&P 40: The M&P 40 is a more modern offering from Smith & Wesson, featuring improved ergonomics and a better trigger compared to the Sigma.
Springfield XD/XDm: The Springfield XD and XDM series offer .40 S&W options with enhanced features and ergonomics.
Sig Sauer P320: The Sig Sauer P320 is a modular pistol that can be configured in .40 S&W and offers a smooth trigger and excellent accuracy.

The S&W Sigma 40 in the Current Market

Although the S&W Sigma 40 is no longer in production, it can still be found on the used market. Its affordability makes it an attractive option for budget-conscious buyers. However, potential buyers should be aware of its limitations, particularly the heavy trigger and limited aftermarket support. It’s essential to thoroughly inspect any used firearm before purchasing to ensure it is in good working condition. [See also: How to Inspect a Used Firearm]

Conclusion

The S&W Sigma 40 represents a significant chapter in Smith & Wesson’s history, marking their entry into the polymer pistol market. While it has its drawbacks, such as the heavy trigger, it offers affordability and reliability. For those seeking a budget-friendly .40 S&W pistol for self-defense, the S&W Sigma 40 remains a viable option, provided its limitations are understood and accepted. The S&W Sigma 40, despite its age, still functions as a reliable firearm. The Smith & Wesson Sigma 40 is a piece of firearms history. The legacy of the S&W Sigma 40 continues to be discussed among gun enthusiasts. Many find the S&W Sigma 40 to be a dependable option. The S&W Sigma 40 is a testament to Smith & Wesson’s innovation. If you’re considering a S&W Sigma 40, weigh its pros and cons carefully. The S&W Sigma 40 offers a unique shooting experience. The S&W Sigma 40 is a reminder of the evolution of polymer pistols. The S&W Sigma 40 is a cost-effective choice for some shooters. The S&W Sigma 40 is a solid, if not spectacular, handgun.