Reliable magazines are as important as the firearm they feed. For operators, competitive shooters, and defensive owners who run MasterPiece Arms platforms, having a lightweight, durable spare magazine that fits flawlessly is a tactical necessity.
MASTERPIECE ARMS DEFENDER
HWK XL 5.56 Giveaway
No purchase necessary
Entry link emailed immediately
A third-party retailer is currently hosting a giveaway for an HWK XL 5.56 pistol package (≈ $1,800 retail value).
I track legit firearm & gear giveaways and share the official entry links when they go live.
Shop this product to add a reliable spare to your kit. These polymer magazines are built specifically for all MasterPiece Arms 5.7×28 pistols and rifles, offered in 10- or 20-round capacities at a price of $39.99.
Design and Compatibility
The MASTERPIECE ARMS DEFENDER magazine uses advanced polymer construction to reduce weight while resisting corrosion and dings from field use. Because it was engineered for Masterpiece Arms, Inc. firearms, fitment is precise across their 5.7×28 pistol and rifle lines. The availability in 10- and 20-round options lets users tailor loadout to range sessions, competition rules, or local carry regulations.
Performance and Use Cases
Chambered for the 5.7×28 cartridge, this magazine supports one of the cartridge’s core benefits: controlled recoil with high-velocity performance. That makes follow-up shots faster and muzzle rise easier to manage—advantages for defensive scenarios, fast-paced drills, and target work. The polymer feed lips and follower are designed to promote reliable stacking of 5.7×28 rounds for both pistols and rifles.
Durability and Maintenance
Polymer magazines are less prone to rust and denting than metal alternatives. Routine maintenance is simple: periodic disassembly, light cleaning, and inspection of the spring will keep the magazine feeding as designed. For operators who train often, carrying multiple 10- or 20-round magazines provides redundancy without excessive weight.
View product details and pricing to compare capacities and add spares to your kit.
Buying Considerations
At $39.99, the MASTERPIECE ARMS DEFENDER offers cost-effective redundancy for owners of MasterPiece Arms 5.7×28 pistols and rifles. Choose 10-round mags for compact carry or compliance, and 20-round magazines when you want extended capacity for range sessions. Clicking any link in this article will take you to the store page where the retailer lists current availability and the Buy Now path.
Check availability and secure spares that match your build and training needs.
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People Also Ask
What makes this product stand out from competitors?
This product offers superior quality and innovative features that set it apart in the market. Its design focuses on both performance and reliability, making it a top choice for professionals and enthusiasts alike.
Is this product suitable for beginners?
Yes, this product is designed with user-friendly features that make it accessible to beginners while still offering advanced capabilities for experienced users.
What warranty or support is available?
The product comes with comprehensive warranty coverage and excellent customer support to ensure your satisfaction and peace of mind.
How does this compare to similar products in its price range?
This product offers exceptional value for its price point, providing features and quality that typically cost significantly more in comparable alternatives.
What maintenance is required?
Minimal maintenance is required thanks to the product’s durable construction and quality materials. Regular cleaning and occasional inspections will keep it performing optimally.
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Experience the quality and performance that makes this product a top choice.

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