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Getting a .450 Bushmaster AR to feed reliably has frustrated shooters for years, mainly because standard AR-15 magazines just weren't designed for straight-walled big-bore rounds. The DuraMag fixes that problem by being engineered from the ground up specifically for .450 Bushmaster, not adapted from something else.
Instead of trying to modify existing magazine designs, DuraMag created a complete system with proprietary internal geometry and bracing that prevents the round misalignment and double-stacking that plague generic magazines. The laser-welded 410 stainless steel body is built as a single piece, then protected with T-360 total coating inside and out. This combination delivers serious corrosion resistance and doesn't degrade after the repeated stress that big-bore rounds put on traditional designs.
The magazine includes several proprietary technologies working together: LipLock geometry keeps rounds aligned and secured, an Advanced Geometry Follower ensures consistent feeding, and EverFlex anti-fatigue spring technology means the spring won't weaken from the unique pressures of .450 ammunition. The seven-round capacity represents what actually works in this caliber without fighting spring pressure, and real-world testing confirms these magazines feed flawlessly through hundreds and thousands of rounds without deformation.
Stainless steel naturally resists rust and corrosion better than aluminum, and the added T-360 coating provides a layer of extra protection plus reduces friction during loading. You can keep these loaded indefinitely with no worries about spring fatigue, and the robotically-welded Post and Hole construction adds durability throughout the body.
Not reliably. While .450 Bushmaster rounds can technically fit in standard AR-15 magazines, the round geometry and width create feeding and alignment problems. This is why DuraMag designed the .450 Bushmaster magazine from scratch with specific internal geometry to handle the straight-walled cartridge properly and feed without malfunctions.
The DuraMag holds 7 rounds of .450 Bushmaster ammunition. Seven rounds represents the practical limit where spring pressure and feeding remain reliable without deformation, even under heavy use or extended loaded storage.
Stainless steel is inherently more corrosion-resistant and durable than aluminum. The DuraMag's 410 stainless body won't deform from the heavy stresses of .450 Bushmaster rounds, and the added T-360 coating provides extra protection against rust while making magazine loading smoother. The weight also aids reliable ejection from the magwell.
Yes. The EverFlex spring technology is specifically engineered to resist fatigue, and DuraMag confirms you can keep these magazines loaded indefinitely without spring degradation or creep. This is a key advantage for hunting and field use where you may store mags for extended periods.
| UPC | 766897412257 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 7X45041175CPD |
| Caliber/Gauge | .450 Bushmaster |
| Capacity | 7 |
| Color | Black |
| Length | 6.2500 |
| Model | |
| Product Type | Magazine |
| Quantity | 1 |
| Shipping Weight | 0.28 |
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