Firearm Magazine Springs
Magazine Springs — Precision Engineered for Reliable Feeding
High-performance magazine springs are small parts with a massive responsibility. At Anderson Quality Spring, we design and manufacture precision magazine springs in-house, ensuring quality control, faster lead times, and customization to meet your exact needs. Built from premium materials and manufactured to withstand constant compression and cyclic fatigue, our in-house production capabilities allow us to deliver precision springs trusted by OEMs, custom magazine builders, and aftermarket suppliers.
Introduction to Firearm Components
Firearm springs are the foundation of any gun’s reliability and performance. The magazine spring is a critical component, responsible for consistently pushing the follower upward to feed ammunition into the chamber. Whether fully loaded for extended periods or cycled rapidly during use, the magazine spring ensures that each round is presented precisely in time with the firearm’s action. Correctly specified magazine springs prevent feeding malfunctions, resist shortening and fatigue, and support the overall dependability of the firearm.
Why Magazine Springs Matter
- Ensure consistent upward pressure to present rounds quickly and reliably to the bolt or slide.
- Prevent nose-dives, double-feeds, and failure-to-feed malfunctions during rapid cycling.
- Maintain spring tension and reliable feeding even after being left fully loaded for extended durations.
Well-specified springs keep magazines running smoothly, ensure proper lock-back on the last round, and perform predictably under load, maintaining reliable performance across thousands of cycles.
Magazine Spring Information
Pistol & Rifle Box Magazine Springs
Designed for standard and extended capacity box magazines. Available as:
- Standard replacement springs (factory-spec tension for reliable everyday carry)
- Extra-power springs (ideal for extended base pads, +10% to +15% power options)
- Custom geometries (specifically wound to fit proprietary follower and magazine body designs)
During the loading and firing cycle, the spring must compress efficiently without binding, and expand smoothly to keep up with high-cyclic rates.
Shotgun Tube Magazine Springs
Engineered to work within tubular magazine configurations to control shell feeding:
- Standard-length springs for factory-spec capacity
- Extended-length springs cut-to-fit for competition or tactical extension tubes
- Anti-bind designs to prevent stacking or twisting inside the tube
Magazine spring selection is critical for feeding reliability, as choosing the appropriate spring rate directly impacts how ammunition interacts with the firearm’s action. The use of extended base plates or magazine tubes requires longer, specifically tuned springs.
Materials & Finishes
- Stainless steel — extreme corrosion resistance for marine, hunting, or harsh environments where moisture intrusion is common.
- Music wire — economical, high-strength for standard duty and training applications.
Finishes available: shot-peened, passivated, phosphate-coated, or proprietary friction-reducing coatings — selected to match application needs and ensure smooth movement inside the magazine body.
Manufacturing & Quality Control
- Precision CNC coiling and complex end-forming to ensure perfect nesting and proper seating against the follower and baseplate.
- Shot-peening, presetting (scragging), and stress-relief processes to extend fatigue life and prevent the spring from losing tension over time.
- Dimensional inspection, load testing at compressed heights, and batch traceability for OEM and contract manufacturing.
Magazine Springs Compatibility & Customization
We provide springs designed for easy installation in a wide range of magazine bodies and platforms (examples: AR-style polymer magazines, standard double-stack pistol magazines, and shotgun tubes). If you need an exact match for a new magazine design or a custom profile for an extended baseplate, our engineering team will work from your sample, CAD model, or functional requirement to produce prototypes and production runs compatible with both standard and modified setups.
Note: For safety and warranty reasons, modifications to magazine capacities and spring replacements should be performed responsibly. Anderson Quality Spring does not provide instructions for firearm modifications.
Testing & Reliability
Every production lot includes:
- Frequent dimensional in-process inspections to ensure high production yields and prevent binding.
- Load testing for fatigue, longevity, and resistance to taking a set.
- Visual and dimensional FINAL inspections.
- Full traceability.
It is best practice to regularly inspect and replace magazine springs as needed—especially in duty or self-defense firearms—to maintain reliability and prevent feeding malfunctions.
Firearms Magazine Spring Applications
- OEM production for magazine and firearms manufacturers
- Aftermarket replacement and performance upgrades for competitive shooters
- Military and law enforcement supply contracts
- Custom designs for high-capacity or proprietary feeding systems
Installation & System Integration
Effective performance of feeding systems depends on precise integration of springs within the magazine body and follower architecture. Small deviations in wire diameter, pitch, coil width, or end-coil geometry can cause binding, reduce capacity, or alter feeding angles. During prototype development, controlled installation procedures and dimensional verification are essential to ensure that measured performance outcomes reflect the spring’s characteristics—not friction from the magazine body.
Our engineering support team collaborates with OEM partners to evaluate integration constraints, identify tolerance stack-ups, and validate spring behavior within the full operating system, enabling predictable feeding, smooth loading, and consistent durability across production environments.
Ordering, Prototyping & Lead Times
We support single-sample prototyping and full production. Please provide a sample, drawing, or specification sheet, and our team will quote materials, processes, and lead time. For high-volume OEM projects, we offer JIT and Kanban support.
Be sure to consult our available resources to help select the appropriate spring for your application. All of our products are manufactured in the USA to ensure the highest quality and reliability.
Safety, Compliance & Warranty
- Products shipped for lawful use only. Customers are responsible for ensuring compliance with all local, state, and federal laws and restrictions, including high-capacity magazine bans.
- Due to legal restrictions, we are unable to ship to foreign addresses or outside the USA.
- Limited warranty against manufacturing defects — see warranty page for details.
- We strongly recommend testing any newly installed magazine spring extensively at the range before relying on it for duty or self-defense.
Let’s Dial in Your Design
Ready to specify a magazine spring?
Request a quote, submit a sample, or talk to an applications engineer today.
BRING US YOUR DESIGN
AQS offers full-service manufacturing of springs and wire forms. We can work together with you and your team to manufacture the custom components you and your team require for your unique applications. Submit your drawings and get started today!