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A lot of people load up multiple magazines just to get through a good practice session at the range. This ProMag drum changes that equation by delivering 40 rounds in a single package, which is three to four times more than what a standard Glock 21 or 30 comes with. The drum form factor means you're carrying capacity without the stack of traditional box magazines.
ProMag built this with impact-resistant DuPont Zytel polymer that stands up to drops, extreme temperature swings, and rough range conditions. The internal spring is heat-treated stainless steel wire, and the feed lips and magazine catch are overmolded stamped steel for consistent feeding and long service life. An injection-molded follower keeps things smooth when you're cycling rounds through your Glock. The whole thing is manufactured in the USA.
This magazine fits Glock 21 and Glock 30 models in .45 ACP, so if you run either of these double-stack frames, it locks right in without modifications. The overall dimensions are 3.5 x 6.5 x 16.25 inches, and it weighs about 1.9 pounds when empty. It's bulkier than a standard magazine, but that's how you pack 40 rounds into something that actually works.
The main advantage here is time on target. More rounds loaded means fewer magazine changes, which matters whether you're working through drills, doing precision practice, or just plinking and having fun. The reloading crank makes topping it off easier on your thumbs compared to manually pressing rounds down one by one.
This is built specifically for .45 ACP Glock 21 and Glock 30 pistols. While some .45 ACP Glock-compatible carbines may work, the design is optimized for these two Glock models. Always verify compatibility with your specific firearm before using.
No modifications are needed. This magazine fits both the Glock 21 and Glock 30 in standard form. That said, the extra weight of a fully loaded 40-round drum does put additional stress on the magazine catch compared to standard magazines.
Yes, this drum magazine comes with a reloading crank to make loading easier. Using the crank saves your thumbs from fatigue when topping off the magazine with all 40 rounds.
ProMag backs their magazines with a lifetime warranty against manufacturer defects. The quality control process involves checking each step of assembly to maintain consistent performance.
| UPC | 708279014963 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | DRMA37 |
| Brand Fit | Glock |
| Caliber/Gauge | .45 ACP |
| Capacity | 40 |
| Color | Black |
| Length | 16.2500 |
| Model | |
| Model Fit | G30 |
| Package Height | 4.0 |
| Package Width | 6.6 |
| Product Type | Accessory-Magazines |
| Shipping Weight | 1.9000000000000001 |
| State Restriction (CA) | NO DIRECT SHIP TO CALIFORNIA |
| State Restriction (IL) | NO SALE TO ILLINOIS PICA |
| State Restriction (OR) | NO SALE TO OREGON |
| State Restriction (RI) | NO DIRECT SHIP TO RHODE ISLAND |
| State Restriction (WA) | NO DIRECT SHIP TO WASHINGTON |
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