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The Mec-Gar name carries serious weight in the firearms world for good reason. This 10-round magazine for your S&W 5900 series pistol, 659, 910, or 915 comes from the same manufacturer that supplies OEM magazines to the biggest firearm companies on the planet. You're getting factory-quality construction at a realistic price.
Every mag starts with a heat-treated carbon steel tube that resists corrosion and abuse. The blued finish gives it that classic look while protecting the steel from rust and wear. The high-tensile music wire spring keeps tension consistent through thousands of cycles, and the polymer follower stays smooth and reliable without the durability issues you sometimes see with cheaper alternatives. The removable polymer baseplate makes field cleaning and maintenance straightforward.
You get numbered witness holes at the 5 and 10-round marks so you can do quick visual counts without dropping rounds all over the range. The baseplate sits flush with your pistol frame, which means no snags during draw and a cleaner profile if you're carrying. The magazine locks up tight in the well with no rattle or movement, giving you that confidence your rounds stay where they should be when it matters.
This isn't a exotic upgrade or a compromise option. Mec-Gar has been making magazines since 1965 and their attention to fit and function shows. The feed geometry is optimized for the 5900 platform, meaning zero surprises at the range or in training. It breaks in smooth, loads responsibly, and runs through cycle after cycle without the hiccups you sometimes encounter with magazines cut corners on tolerances or materials.
Yes. This magazine is designed to fit the entire S&W 5900 series lineup including the 5903, 5904, 5906, 5943, 5944, and 5946, as well as the 659, 910, and 915 models. Keep in mind that because this magazine spans decades of S&W manufacturing with slight tolerance variations, a very small amount of filing may occasionally be needed on the baseplate for perfect lockup on specific older pistols.
Mec-Gar manufactures OEM magazines for major firearm companies including Smith & Wesson, SIG Sauer, Browning, Remington, Walther, and others. That means your S&W pistol was likely fed ammunition using magazines made by the same company. Since 1965, they've been refining magazine manufacturing to exacting standards, and their magazines are used by militaries and police agencies worldwide.
Mec-Gar magazines come ready to use out of the box. New magazines sometimes have stiffer springs than broken-in units, which can make loading to full capacity slightly harder initially. This is normal and the spring will relax naturally through regular use over a few range sessions. The quality construction means you won't experience the binding or feeding issues that cheap magazines develop early on.
Factory S&W 5900 magazines typically come in 15-round capacities, so this 10-rounder is the compliant option. It provides a flush fit with the pistol grip, sits cleaner in a holster or carry setup, and loads just as reliably as higher-capacity alternatives. The smaller capacity doesn't sacrifice any functionality—just ammunition count.
| UPC | 765595114104 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | MGSW5910B |
| Brand Fit | S&W |
| Caliber/Gauge | 9mm |
| Capacity | 10 |
| Length | 9.2000 |
| Model | |
| Model Fit | 659 |
| Product Type | Magazine |
| Shipping Weight | 0.2188 |
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