ProMag Sig Sauer P320 9mm Luger 17 Round Pistol Magazine Review

First Impressions of ProMag Sig Sauer P320 9mm Luger 17 Round Pistol Magazine

The ProMag Sig Sauer P320 9mm Luger 17 Round Pistol Magazine promises to be a reliable and cost-effective alternative to factory magazines for the popular Sig Sauer P320 platform. With its heat-treated steel construction and a 17-round capacity, it aims to provide shooters with ample firepower and durability at a reasonable price point. I was particularly interested in testing this magazine because I’ve been running a P320 in my EDC rotation, and having extra magazines is always a plus, especially for training.

My factory Sig Sauer P320 magazines have performed flawlessly, but they are expensive. I was looking for a more budget-friendly option for range use, and the ProMag magazine seemed like a good candidate. I considered Mec-Gar magazines, which have a stellar reputation, but the ProMag offering was significantly cheaper, so I decided to give it a shot. Upon unboxing, the magazine felt solid. It has a decent weight, instilling some confidence in its build quality.

Compared to the factory Sig Sauer magazine, the finish on the ProMag is noticeably different; it’s a blued finish rather than the smoother, more corrosion-resistant finish on the OEM magazine. While the overall construction appeared sound, I was cautiously optimistic, knowing that aftermarket magazines can sometimes be hit-or-miss. My first impression was a mix of intrigue and apprehension. I hoped it would perform as advertised, but I was prepared for potential issues.

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Real-World Testing: Putting ProMag Sig Sauer P320 9mm Luger 17 Round Pistol Magazine to the Test

First Use Experience

My first experience with the ProMag Sig Sauer P320 9mm Luger 17 Round Pistol Magazine was at my local outdoor shooting range. I loaded it up with 17 rounds of 115-grain FMJ ammunition and inserted it into my Sig Sauer P320. The magazine seated with a positive click, and the first round chambered without issue. I ran through several magazines worth of ammo, focusing on controlled pairs and rapid-fire drills.

The magazine performed adequately for the first few magazines. However, after about 50 rounds, I experienced a few failures to feed, where the slide failed to fully strip a round from the magazine and chamber it. This occurred more frequently as the magazine got warmer. It was a bit disappointing, but I continued testing to see if the issue would resolve itself after a break-in period.

Extended Use & Reliability

After several weeks of use and approximately 500 rounds fired through the ProMag Sig Sauer P320 9mm Luger 17 Round Pistol Magazine, the reliability did not significantly improve. The failures to feed persisted, particularly during rapid-fire sequences. I also noticed that the magazine follower occasionally stuck, especially when the magazine was fully loaded. Cleaning the magazine didn’t seem to alleviate the issue.

As for durability, the blued finish started to show wear marks along the edges and where it contacted the magazine well. The magazine itself showed no signs of bending or cracking. Compared to my factory Sig Sauer magazines, which have remained flawless through thousands of rounds, the ProMag was a clear disappointment. The difference in reliability was significant enough that I wouldn’t trust the ProMag magazine for anything beyond casual range use.

Breaking Down the Features of ProMag Sig Sauer P320 9mm Luger 17 Round Pistol Magazine

Specifications

The ProMag Sig Sauer P320 9mm Luger 17 Round Pistol Magazine is designed as a replacement or spare magazine for the Sig Sauer P320 chambered in 9mm Luger. It features a 17-round capacity, offering a standard ammunition load for this pistol platform. The magazine body is constructed of heat-treated steel, promising strength and durability.

The ProMag magazine includes an injection-molded magazine follower, designed to smoothly feed rounds into the chamber. The magazine spring is formed from heat-treated chrome silicone wire, aiming to provide consistent pressure and reliable feeding. The ProMag has a blued finish, providing some level of corrosion resistance. These specifications suggest a magazine built for durability and reliable performance.

Performance & Functionality

The ProMag Sig Sauer P320 9mm Luger 17 Round Pistol Magazine falls short of expectations in terms of overall performance and functionality. While it initially feeds rounds without issue, it quickly becomes prone to failures to feed, especially during rapid-fire scenarios. The magazine follower’s tendency to stick further contributes to its unreliability. The magazine does function, but its inconsistent performance makes it unsuitable for serious use.

The ProMag’s primary weakness is its unreliability, which is the most critical aspect of a magazine. Its strength, on the other hand, is its price point, which is significantly lower than factory magazines. However, the cost savings are quickly negated by the magazine’s inability to consistently feed ammunition. The ProMag simply does not meet the performance expectations of a reliable magazine.

Design & Ergonomics

The ProMag Sig Sauer P320 9mm Luger 17 Round Pistol Magazine features a fairly standard design, closely resembling the factory Sig Sauer magazine in overall dimensions. The heat-treated steel construction provides a solid feel, but the blued finish lacks the smooth, refined look of the OEM magazine. The weight is comparable to the factory magazine, contributing to a balanced feel when inserted into the pistol.

There isn’t a significant learning curve associated with using the ProMag. It loads and inserts into the pistol in the same manner as the factory magazine. However, the ergonomic advantage is lost due to the magazine’s inconsistent feeding. Despite the familiar design, the ProMag’s performance issues detract from its usability.

Durability & Maintenance

The ProMag Sig Sauer P320 9mm Luger 17 Round Pistol Magazine, built from heat-treated steel, feels robust enough to withstand regular use. However, the blued finish is prone to wear, and signs of abrasion become visible relatively quickly. With regular cleaning and proper maintenance, the magazine body should last for a reasonable amount of time. However, the spring and follower are likely to be the first components to degrade.

The ProMag magazine is relatively easy to disassemble for cleaning and maintenance. The baseplate can be removed to access the spring and follower. Regular cleaning and light lubrication can help to minimize issues with the follower sticking. However, the long-term durability of the internal components remains questionable.

Accessories and Customization Options

The ProMag Sig Sauer P320 9mm Luger 17 Round Pistol Magazine does not come with any additional accessories or customization options. Its design is intended as a direct replacement for the factory magazine. While it should be compatible with aftermarket baseplates designed for Sig Sauer P320 magazines, there are no specific customization features offered by ProMag for this product.

The ProMag magazine is designed to work with the standard Sig Sauer P320 magazine well, so accessories that are compatible with factory magazines should also work with the ProMag. However, given the reliability issues, I wouldn’t recommend investing in additional accessories for this magazine.

Pros and Cons of ProMag Sig Sauer P320 9mm Luger 17 Round Pistol Magazine