Description
Finding good sticks for the older Smith & Wesson third-generation autos gets harder every year, which is exactly why this Mec-Gar magazine is worth grabbing. It's a detachable 17-round magazine chambered for 9mm and built to drop straight into the S&W 5900 series, along with the 659, 910, and 915. The best part is it holds two more rounds than the standard 15-round factory mag while still sitting flush with the bottom of the grip, so you get the extra capacity without a floorplate hanging out the bottom.
Mec-Gar has been making magazines in Italy since 1965 and does OEM work for a long list of major firearm brands, so this isn't some no-name aftermarket part. The tube is heat-treated carbon steel with a nickel finish that adds corrosion resistance and slicks up insertion and feeding. Inside you get a high-tensile music wire spring and a high-impact polymer follower, which is the combination that keeps rounds stacking and feeding the way they should through long range sessions.
What the Mec-Gar MGSW5917N Fits
This one covers a lot of ground. Beyond the 5900 series, 659, 910, and 915, these Smith-pattern Mec-Gar mags are also known to run in the Marlin Camp 9 carbine and a few Girsan pistols built on the same platform. If you've got one of those and want a reliable spare, this is a natural fit.
Why This Mag Earns a Spot in Your Range Bag
The polymer floorplate is removable for cleaning, and the whole design uses standard Mec-Gar components, so keeping it maintained is simple. Whether you're stocking up on spares for a duty gun, feeding a range toy, or just want a dependable backup that won't let you down, this is the magazine folks reach for. Owners of Mec-Gar mags tend to buy them again for a reason, and this 5900-series stick lives up to that track record.
Key Specifications
- Manufacturer: Mec-Gar
- Manufacturer Part Number: MGSW5917N
- UPC: 765595440494
- Caliber: 9mm Luger
- Capacity: 17 Rounds
- Brand Fit: Smith & Wesson
- Model Fit: 5900 Series, 659, 910, 915
- Product Type: Detachable
- Finish: Nickel
- Tube Material: Heat-Treated Carbon Steel
- Follower: High-Impact Polymer
- Spring: High-Tensile Music Wire
- Floorplate: Flush-Fit Polymer, Removable
- Length: 9.25 in
- Country of Origin: Italy
What’s Included
- One Mec-Gar MGSW5917N 17-round 9mm magazine
Frequently Asked Questions
Which pistols does the Mec-Gar MGSW5917N fit?
It's designed for the Smith & Wesson 5900 series along with the 659, 910, and 915 in 9mm. These Smith-pattern Mec-Gar mags are also commonly run in the Marlin Camp 9 carbine and certain Girsan pistols built on the same platform. If you're unsure about a specific model, check that your gun takes the 59-series magazine.
Does this 17-round magazine sit flush with the grip?
Yes. Even though it holds two more rounds than the standard 15-round factory magazine, the Mec-Gar MGSW5917N still fits flush with the bottom of the grip. You get the extra capacity without a floorplate extension sticking out.
Is the Mec-Gar magazine as good as a factory S&W mag?
Mec-Gar is an OEM supplier for many of the world's biggest firearm makers and has been building magazines in Italy since 1965. Their mags are engineered to meet or exceed factory specs, and shooters who own them tend to trust them over aftermarket alternatives. Many owners report reliable, flawless feeding session after session.
What is the magazine made of and how does the nickel finish help?
The tube is heat-treated carbon steel with a nickel plating over it. The nickel adds corrosion resistance and helps the magazine slide in and out and feed more smoothly. Inside you'll find a high-tensile music wire spring and a high-impact polymer follower.





Reviews
There are no reviews yet.