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The ProMag SD40 drum magazine is purpose-built for the Smith & Wesson SD40, delivering the kind of high capacity that changes how you approach a day at the range. Instead of switching magazines every few rounds, you get 50 rounds in a format that's practical and proven in real-world use.
The construction here is genuinely thoughtful. ProMag paired a proprietary DuPont Zytel polymer drum body with a hybrid steel upper magazine tower. That combination gives you the lightweight benefits of polymer without compromising strength where it matters most. The steel component handles the critical feed interface, while the injection-molded follower and heat-treated stainless steel spring work together to move ammunition smoothly and reliably into your pistol. Everything is precision assembled, checked, and double-checked in ProMag's facility.
Fifty rounds means extended shooting sessions on your terms. Whether you're running organized matches that allow drums, setting up for volume training days, or testing different loads and techniques, this magazine eliminates the stop-and-reload cycle. The drum format sits naturally with the SD40, designed for seamless fit without any modifications needed.
ProMag backs every magazine with a lifetime warranty against manufacturer defects. These are made in the USA using traditional stamping and welding combined with modern injection molding techniques. The result is a magazine that handles real use without flinching. From range sessions to storage, it's built to take it.
Yes, this magazine is specifically designed for the Smith & Wesson SD40 and fits without modifications. Smith & Wesson also confirms these SD40 magazines are compatible with the SDVE40 variant. If you have questions about your specific model, reach out with the serial number or specs.
ProMag builds these with the same care as factory options, using heat-treated springs and precision assembly. They've been field-tested by ProMag's USPSA competition team and come backed by a lifetime warranty. Many range users run them regularly without issues, though like any magazine, proper loading technique and occasional inspection keep them running well.
Most shooters use a magazine loader or loader tool designed for drum magazines, which makes the process much faster than loading by hand. Without one, loading all 50 rounds takes patience and time. Once loaded, the internal spring tension keeps everything secure and ready to feed.
Magazine legality varies depending on location and specific use. We recommend checking your local range rules and jurisdiction before purchasing, as some areas have restrictions on high-capacity magazines. If you're competing, verify the format is allowed in your specific match.
| UPC | 708279016264 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | DRM-A102 |
| Caliber/Gauge | .40 S&W |
| Capacity | 50 |
| Color | Black |
| Model | |
| Product Type | Magazine |
| Shipping Weight | 1.75 |
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