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The .458 SOCOM is all about stopping power, which means your magazine needs to deliver that reliability every single time. This DuraMag SS magazine is built from the ground up specifically for this caliber, not as an afterthought or a modified version of something else. It starts with 410 stainless steel construction that won't flex or swell, even if you keep it loaded for extended periods. The whole thing gets DuraMag's T-360 protective coating both inside and out, which means serious corrosion resistance whether you're running this rifle at the range, in the field, or pulling it from storage after months sitting untouched.
Inside, you get an Advanced Geometry Follower that's designed specifically for how .458 SOCOM rounds stack and feed. DuraMag pairs this with their EverFlex spring, which is tuned for the power and size of these bigger cartridges. The spring maintains its tension predictably and won't wear out from storage, even loaded. The whole design is over-engineered to handle the demands of big-bore shooting without compromise.
Stainless steel magazines perform differently than aluminum, and for the .458 SOCOM, that's a benefit. You get a heavier magazine that doesn't flex under pressure, feeds consistently, and handles the sheer power of this cartridge without the performance degradation you might see with other materials. Unlike polymer, it won't swell or shift when stored loaded. Unlike aluminum, it won't corrode or degrade in challenging conditions.
This is a 10-round capacity magazine, which means it works well for everything from hunting to tactical applications. It fits standard AR-15 lower receivers and feeds .458 SOCOM ammo reliably, so you can load up and trust your magazine to keep pace with your rifle's capability.
Yes. The DuraMag SS .458 SOCOM magazine is designed to fit standard AR-15 magwells and works with typical rifle mag pouches, though the stainless steel construction makes it slightly heavier than aluminum alternatives. The 10-round capacity fits within the standard magazine profile without any compatibility issues.
Absolutely. DuraMag specifically over-engineered these magazines for extended loaded storage. The stainless steel body won't flex or swell, and the EverFlex spring won't fatigue or lose tension even if the magazine sits loaded indefinitely. The T-360 coating protects against corrosion throughout storage.
The .458 SOCOM cartridge is physically much larger than 5.56 NATO. Due to the bigger diameter and longer rounds, a 30-round 5.56 magazine body will only hold approximately 10 rounds of .458 SOCOM. This is a normal trade-off of running big-bore AR platforms, but you get the benefit of significantly more stopping power per round.
This magazine is purpose-built from the factory for .458 SOCOM, not converted from a standard magazine. DuraMag engineered the follower geometry, spring tension, and overall design specifically for how these larger rounds stack and feed. Factory-designed magazines for a specific cartridge offer superior reliability compared to modified versions.
| UPC | 766897412158 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 1058041175CPD |
| Caliber/Gauge | .458 Socom |
| Capacity | 10 |
| Color | Black |
| Length | 8.0500 |
| Model | |
| Model Fit | AR-15 |
| Product Type | Magazine |
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