Spare magazines are one of the simplest upgrades that deliver outsized improvements in readiness, whether you’re training on the range or keeping a duty-ready pistol in the safe. A reliable replacement magazine reduces feeding issues, eases reloads, and provides confidence when it matters most.
PROMAG RUGER SR40 is a dedicated replacement magazine built for owners of Ruger SR40 series pistols. This magazine is constructed from heat-treated blued steel with components molded from Technapolymer, and it features an antifatigue spring designed to keep the magazine loaded and ready for years to come. Shop this product
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Design and construction
The PROMAG RUGER SR40 blends metal and advanced polymer where each material adds functional value. Heat-treated blued steel provides a hard, wear-resistant body and feed lips that withstand repeated cycles. Internal components molded from Technapolymer reduce weight and resist corrosion while maintaining dimensional stability under temperature changes. The antifatigue spring is a standout feature — engineered to resist set and maintain reliable spring tension over long-term storage.
Why these features matter
Heat-treated blued steel resists deformation at the feed lips, which helps reduce misfeeds. Technapolymer components offer consistent follower movement and reduced friction. The antifatigue spring minimizes follower sag after thousands of cycles, so rounds stack reliably and the magazine stays ready without frequent spring replacement.
Promag is a well-known name for practical, budget-conscious options; this model is listed under Model: Various and priced at $26.99, making it an affordable way to add a spare or a reliable backup for duty and training. View product details and pricing
Fit, handling, and practical tips
As a replacement for Ruger SR40 pistols, this magazine should be checked for fit on your specific SR40 variant before relying on it in critical applications. Clean the feed lips and apply a light, approved lubricant to mating surfaces during break-in. Rotate magazines in your training loadout so springs maintain tension evenly over time.
Purchase and availability
At $26.99, the PROMAG RUGER SR40 offers a straightforward, cost-effective spare magazine option. Clicking any of the links in this article will take you to our shop page where you can view the product and complete purchase from the retailer. Check current stock and compatibility before ordering. Check availability
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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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