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The Smith & Wesson 5900 Series represents one of the most respected lineups in the double-action semi-automatic pistol world. Introduced in the late 1980s as an evolution of the legendary Model 59 platform, the 5900 family, including the 5903, 5904, 5906, 5924, 5926, 5943, 5944, 5946, and 5967, earned a reputation for mechanical reliability, superior ergonomics, and duty-grade durability. Law enforcement agencies and discerning civilian shooters alike trust these pistols with their lives, and that trust only holds as long as the magazines feeding them are equally dependable.
S&W 5900 Series magazines are purpose-built double-stack 9mm magazines designed to sustain the high feeding demands of these all-metal pistols. At The Mag Shack, we offer the trusted Mec-Gar brand for this platform.
Mec-Gar isn’t just another aftermarket brand; they’re the OEM supplier for many of the world’s top firearm manufacturers, including Smith & Wesson itself. That means when you load up a Mec-Gar mag, you’re often feeding your pistol with the same quality standard it was designed around. Their cold-hammer-forged steel bodies, heat-treated finishes, and optimized feed lips deliver consistent, reliable feeding shot after shot.
Mec-Gar’s magazines feature a proprietary anti-friction coating that dramatically reduces friction during loading and cycling. This translates to smoother insertion, more predictable feeding, and a longer service life, even through high round counts or extended storage.
Every Smith & Wesson 5900 magazine and companion model in this lineup is engineered for clean, positive, drop-free operation. Under stress, the last thing you want is a magazine that requires an extra tug to clear. These eject cleanly and reliably, keeping your reload as fast and smooth as possible.
Unlike polymer options that can flex under pressure or crack in cold conditions, these all-steel magazines maintain their rigidity and dimensional integrity regardless of the environment.
Whether you’re navigating state compliance requirements or maximizing your capability, The Mag Shack carries S&W 5900 series magazines in four distinct capacities:
All four options are available in 9mm, and all are manufactured by Mec-Gar to the same exacting standards.
The Smith and Wesson 5900 Series magazine platform is notably versatile. In addition to all 5900 Series variants, including the 5903, 5904, 5905, 5906, 5924, 5926, 5943, 5944, 5946, and 5967, these magazines are also compatible with several other S&W pistols: the 459, 659, 910, and 915. If you own multiple pistols from this lineage, a single magazine investment can potentially cover the entire collection.
Authentic factory Smith & Wesson model 5900 magazines are typically marked with the S&W logo and model/caliber information on the magazine body. However, Mec-Gar aftermarket magazines, which are often made to the same OEM spec, will be marked with the Mec-Gar name and relevant caliber and capacity data.
Quality S&W 5900 series magazines should display clear capacity markings and caliber designation (9mm) on the body. Mec-Gar magazines will feature the Mec-Gar logo, caliber, and round count stamped or roll-marked on the magazine. Avoid any magazine that lacks clear markings or shows inconsistent follower travel, as these are signs of inferior manufacturing that can lead to feeding failures.
