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The ProMag SMIA18 gives you extra capacity when you need it for your S&W SD .40 S&W pistol. This 15-round magazine is made from heat-treated steel and TIG-welded for strength, with a chrome-silicon wire spring designed to handle the higher pressures of .40 caliber shooting. The injection-molded follower is engineered to guide rounds smoothly into the chamber.
Like any aftermarket magazine, fit is important. Some users report that new springs are stiff out of the box and take a few loading cycles to break in, especially when trying to load all 15 rounds. If you notice the magazine sits slightly low in the mag well or feels tight initially, a few range sessions should get things running smoothly. The removable floor plate makes cleaning and maintenance straightforward if needed.
Made in the USA and backed by ProMag's lifetime warranty against manufacturer defects. Note that this magazine is not compatible with the SD40VE variant, only the standard SD40 platform. Ideal for having spare mags at the range or training, or as a backup magazine for extended practice sessions.
No, this magazine is designed specifically for the standard S&W SD40, not the SD40VE variant. The two models have different magazine wells and compatibility. You'll need magazines designed for the VE platform if you own that model.
New ProMag magazines have stiff springs that may feel firm when loading, especially as you approach full capacity. This is normal and typically improves with use as the spring breaks in over your first few range sessions. Using a magazine loader is recommended to reduce hand fatigue.
Some users report that new magazines may sit slightly lower in the mag well than factory mags. This is usually due to tolerances and typically resolves with break-in. If there's a feeding issue, make sure the magazine is fully seated in the magazine well before loading the chamber.
ProMag's warranty covers manufacturer defects in materials and workmanship for the life of the magazine. If you experience a defect, you can contact ProMag directly for replacement. The warranty does not cover damage from improper use, drops, or modifications.
ProMag magazines are primarily known as cost-effective options for range training and practice. If you're relying on a firearm for defense, factory OEM magazines from Smith & Wesson are generally recommended for their proven reliability and quality control.
Yes, the ProMag SMIA18 is manufactured in the USA in ProMag's Arizona facility. The body is constructed using TIG-welded, heat-treated steel for durability and strength.
| UPC | 708279013379 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | SMIA18 |
| Brand Fit | S&W |
| Caliber/Gauge | .40 S&W |
| Capacity | 15rd |
| Model | |
| Model Fit | SD |
| Product Type | Detachable |
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