
Availability: In Stock
The ProMag S&W M&P9 9mm 50-round drum magazine gives you serious capacity without breaking the bank—or your trigger finger. Built tough with a proprietary polymer drum housing and reinforced steel internals, this magazine feeds reliably through M&P9 platforms and delivers the round count you need for range days, competition, or serious training. It's made in the USA and backed by a lifetime guarantee against manufacturer defects, so you're not gambling when you load it into your duty or service pistol.
ProMag's engineering approach blends time-tested methods with modern materials: the drum housing uses DuPont Zytel-based polymer for durability and weight savings, while the magazine upper tower incorporates a full-length steel internal insert that's stamped and welded like factory-spec designs. The follower and spring are precision-molded and heat-treated stainless respectively, built to handle the demands of a high-capacity drum without premature wear or feed issues. This isn't a flimsy novelty mag—it's designed for function.
Whether you're stocking spares for your M&P9, pushing your round count at the range, or just want the advantage of fewer reloads, the 50-round capacity speaks for itself. At black, it fits naturally into any tactical or training setup. With ProMag's lifetime defect warranty, you can trust this magazine to stay in the fight.
| Firearm Compatibility | Smith & Wesson M&P9 9mm |
| Capacity | 50 rounds |
| Caliber | 9mm |
| Magazine Type | Drum magazine |
| Housing Material | DuPont Zytel-based polymer |
| Interior Hardware | Stamped and welded steel insert (upper tower), heat-treated stainless steel spring |
| Color | Black |
| Warranty | Lifetime against manufacturer defects |
| Origin | Made in USA |
Yes—this ProMag drum is designed specifically for the S&W M&P9 platform in 9mm. It will fit and feed through your M&P9 pistol.
ProMag backs every magazine with a lifetime guarantee against manufacturer defects. If it fails due to a defect in materials or workmanship, you're covered.
Yes, the ProMag S&W M&P9 50-round drum is manufactured in the USA.
Drum magazines hold significantly more ammunition—50 rounds instead of the typical 15–17 you'd get from a standard M&P9 magazine. This means fewer reloads during training, competition, or range practice. The tradeoff is added weight and bulk, but the capacity advantage is substantial for extended shooting sessions.

SKU: 115847818 • Width: 7in • Height: 3in • Depth: 14.25in • Weight: 1.75oz





Availability: In Stock
The ProMag S&W M&P9 9mm 50-round drum magazine gives you serious capacity without breaking the bank—or your trigger finger. Built tough with a proprietary polymer drum housing and reinforced steel internals, this magazine feeds reliably through M&P9 platforms and delivers the round count you need for range days, competition, or serious training. It's made in the USA and backed by a lifetime guarantee against manufacturer defects, so you're not gambling when you load it into your duty or service pistol.
ProMag's engineering approach blends time-tested methods with modern materials: the drum housing uses DuPont Zytel-based polymer for durability and weight savings, while the magazine upper tower incorporates a full-length steel internal insert that's stamped and welded like factory-spec designs. The follower and spring are precision-molded and heat-treated stainless respectively, built to handle the demands of a high-capacity drum without premature wear or feed issues. This isn't a flimsy novelty mag—it's designed for function.
Whether you're stocking spares for your M&P9, pushing your round count at the range, or just want the advantage of fewer reloads, the 50-round capacity speaks for itself. At black, it fits naturally into any tactical or training setup. With ProMag's lifetime defect warranty, you can trust this magazine to stay in the fight.
| Firearm Compatibility | Smith & Wesson M&P9 9mm |
| Capacity | 50 rounds |
| Caliber | 9mm |
| Magazine Type | Drum magazine |
| Housing Material | DuPont Zytel-based polymer |
| Interior Hardware | Stamped and welded steel insert (upper tower), heat-treated stainless steel spring |
| Color | Black |
| Warranty | Lifetime against manufacturer defects |
| Origin | Made in USA |
Yes—this ProMag drum is designed specifically for the S&W M&P9 platform in 9mm. It will fit and feed through your M&P9 pistol.
ProMag backs every magazine with a lifetime guarantee against manufacturer defects. If it fails due to a defect in materials or workmanship, you're covered.
Yes, the ProMag S&W M&P9 50-round drum is manufactured in the USA.
Drum magazines hold significantly more ammunition—50 rounds instead of the typical 15–17 you'd get from a standard M&P9 magazine. This means fewer reloads during training, competition, or range practice. The tradeoff is added weight and bulk, but the capacity advantage is substantial for extended shooting sessions.
SKU: 115847818 • Width: 7in • Height: 3in • Depth: 14.25in • Weight: 1.75oz
