First Impressions of ProMag Polymer Sig Sauer SP2340 .40 S&W 50-Round Pistol Magazine
The ProMag Polymer Sig Sauer SP2340 .40 S&W 50-Round Pistol Magazine promises a significant increase in firepower for a trusted handgun platform. This high-capacity magazine, manufactured by ProMag, aims to provide a substantial advantage in situations where every round counts. The concept of a 50-round magazine for a .40 S&W pistol immediately sparks curiosity and begs the question: can a polymer magazine reliably deliver that much ammunition?
I was looking for a solution to reduce magazine changes during training exercises and potentially offer a more robust option for home defense. Reloading drills can eat up valuable range time, and having a higher capacity could translate to more efficient training. This led me to explore options like the ProMag Polymer Sig Sauer SP2340 .40 S&W 50-Round Pistol Magazine.
Upon unboxing, the magazine feels surprisingly lightweight, owing to its polymer construction. The finish is a matte black, and the magazine’s dimensions are noticeably larger than the factory 12-round magazines for my Sig Sauer SP2340. The build quality appears decent, but I remain cautiously optimistic, as polymer magazines, especially high-capacity ones, can sometimes suffer from feeding issues.
I considered other high-capacity magazines, including some metal options. However, the ProMag offered the most significant capacity increase at a relatively reasonable price point. My initial excitement is tempered by the understanding that reliability is paramount, and I’m eager to see how it performs at the range. Let’s just say I’m approaching this with a healthy dose of skepticism blended with hope.
Real-World Testing: Putting ProMag Polymer Sig Sauer SP2340 .40 S&W 50-Round Pistol Magazine to the Test
First Use Experience
My first range trip with the ProMag Polymer Sig Sauer SP2340 .40 S&W 50-Round Pistol Magazine was a mix of anticipation and slight apprehension. I tested it at my local shooting range, running a variety of .40 S&W ammunition through my Sig Sauer SP2340, including FMJ and JHP rounds.
The first few magazines were smooth, with consistent feeding and no noticeable issues. I ran the magazine dry multiple times. By the third loading, however, I experienced a few failures to feed, particularly with the JHP rounds.
The failures seemed more frequent as the magazine heated up during rapid firing strings. It became apparent that the ProMag may be more finicky than the factory magazines.
Extended Use & Reliability
After several weeks of use and approximately 500 rounds fired through the ProMag Polymer Sig Sauer SP2340 .40 S&W 50-Round Pistol Magazine, the reliability issues persisted. While it performed adequately with FMJ ammunition, the failures to feed with JHP rounds remained a concern. This made the magazine unreliable for self-defense purposes in my opinion.
Visually, the magazine showed only minor signs of wear, primarily scuff marks from insertion and removal. Cleaning the magazine was relatively straightforward, but I did notice that the polymer body seemed to attract more dirt and grime than metal magazines. I suspect the texture of the polymer is the reason for this.
Compared to my experience with factory Sig Sauer magazines, the ProMag fell short in terms of reliability. While the increased capacity was enticing, the consistent feeding issues made it a less-than-ideal choice for serious use.
Breaking Down the Features of ProMag Polymer Sig Sauer SP2340 .40 S&W 50-Round Pistol Magazine
Specifications
The ProMag Polymer Sig Sauer SP2340 .40 S&W 50-Round Pistol Magazine is designed specifically for the Sig Sauer SP2340 chambered in .40 S&W. It boasts a 50-round capacity, which is a significant increase compared to the standard 10 or 12-round factory magazines. The magazine body is constructed from a proprietary DuPont Zytel based polymer, aiming for both durability and weight reduction.
The follower is injection molded, and the magazine spring is formed from heat-treated chrome silicon wire. These specifications promise reliable feeding and consistent spring pressure. However, my testing revealed that the spring tension may not be sufficient to reliably feed all types of ammunition.
These specifications matter because the reliability of a magazine directly impacts the performance of the firearm. A high-capacity magazine is useless if it cannot consistently feed ammunition.
Performance & Functionality
In terms of performance, the ProMag Polymer Sig Sauer SP2340 .40 S&W 50-Round Pistol Magazine is a mixed bag. While it does offer a significant increase in capacity, its reliability is questionable. The failures to feed, particularly with JHP rounds, are a major concern.
The magazine functions best with FMJ ammunition, but even then, occasional hiccups can occur. The increased weight of a fully loaded 50-round magazine can also affect the handling and balance of the pistol. This added weight impacts recoil management and follow-up shots.
Design & Ergonomics
The polymer construction makes the ProMag relatively lightweight for its size. However, the overall design is somewhat bulky, and the extended length can make it challenging to conceal. The grip texture on the magazine is minimal, which could be an issue for shooters with larger hands or those wearing gloves.
There’s a slight learning curve associated with loading the magazine, as it requires more force to compress the spring as you approach full capacity. The magazine is not particularly user-friendly. The polymer construction, while lightweight, doesn’t inspire the confidence of steel-bodied magazines.
Durability & Maintenance
The DuPont Zytel based polymer construction appears reasonably durable. After several range trips, there are no signs of cracking or deformation. The matte black finish is prone to scuffing, but this is purely cosmetic.
Maintaining the magazine is relatively simple. Disassembling it for cleaning is straightforward, and the polymer body is resistant to most solvents and cleaning agents. I suspect the magazine should hold up for several years with proper care, although the spring may need replacement sooner than a standard capacity magazine.
Accessories and Customization Options
The ProMag Polymer Sig Sauer SP2340 .40 S&W 50-Round Pistol Magazine doesn’t offer any specific accessories or customization options. It is designed to be a direct replacement for the factory magazines. It is compatible with standard magazine pouches, although the extended length may require specialized pouches. There are no options for aftermarket followers or baseplates.
Pros and Cons of ProMag Polymer Sig Sauer SP2340 .40 S&W 50-Round Pistol Magazine
Pros
- Significantly increased capacity (50 rounds).
- Relatively lightweight due to polymer construction.
- Easy to disassemble and clean.
- Affordable compared to some other high-capacity options.
- Ideal for range training and reduced reloading time (with FMJ ammo).
Cons
- Unreliable feeding, especially with JHP ammunition.
- Bulky design, difficult to conceal.
- May affect the balance and handling of the pistol.
- Questionable long-term durability of the spring.
Who Should Buy ProMag Polymer Sig Sauer SP2340 .40 S&W 50-Round Pistol Magazine?
The ProMag Polymer Sig Sauer SP2340 .40 S&W 50-Round Pistol Magazine is perfect for recreational target shooters who prioritize high capacity and are willing to accept potential reliability issues. It could also be suitable for individuals who primarily use FMJ ammunition for training purposes and want to minimize reloading time.
Those who rely on their firearm for self-defense or duty use should skip this product. The unreliable feeding, particularly with JHP rounds, makes it an unsuitable choice for situations where consistent performance is critical.
Must-have accessories or modifications? Consider investing in a high-quality magazine loader to ease the loading process. Regular cleaning and maintenance are also essential to maximize the magazine’s lifespan.
Conclusion on ProMag Polymer Sig Sauer SP2340 .40 S&W 50-Round Pistol Magazine
The ProMag Polymer Sig Sauer SP2340 .40 S&W 50-Round Pistol Magazine presents a tempting proposition: a massive increase in firepower for a relatively affordable price. However, its unreliable feeding, especially with defensive ammunition, makes it difficult to recommend for serious use.
The value proposition is questionable. While the price is lower than some competitors, the unreliability undermines its usefulness. I would personally not recommend it for self-defense or any situation where consistent performance is paramount.
Ultimately, the ProMag Polymer Sig Sauer SP2340 .40 S&W 50-Round Pistol Magazine is a range toy with limitations. While it may offer some entertainment value and reduce reloading time during training, its unreliability makes it a gamble that’s not worth taking when lives are on the line. Buyer beware. Consider investing in higher-quality, lower-capacity magazines for duty or self-defense use.