Springfield Armory Ejector Spring MA0405 – High‑Performance Replacement PartSpringfield Armory Ejector Spring MA0405 (UPC 706397857158)
Upgrade the reliability of your AR‑15, M4, or compatible rifle with the Springfield Armory Ejector Spring MA0405. Engineered for precision and durability, this high‑quality ejector spring ensures consistent cartridge ejection and smooth operation in demanding environments.
Key Features & Benefits
- Premium Stainless Steel Construction – Corrosion‑resistant material guarantees long‑term performance and prevents rust in harsh conditions.
- Precision‑Engineered Dimensions – Exact tolerances match original equipment specifications for a perfect fit.
- Enhanced Ejection Reliability – Optimized spring rate reduces stovepipe and double‑feed malfunctions.
- Easy Installation – Direct replacement for factory ejector springs; no special tools required.
- Universal Compatibility – Works with standard AR‑15, M4, and other rifles that use the MA0405 spring size.
- Durable Finish – Heat‑treated for added strength and longevity, even after thousands of cycles.
Technical Specifications
| Specification | Detail |
|---|
| Part Number | MA0405 |
| UPC | 706397857158 |
| Material | Stainless Steel (AISI 304) |
| Spring Rate | Optimized for standard AR‑15/M4 platforms |
| Length (unloaded) | ≈ 1.85 inches (47 mm) |
| Weight | ≈ 0.15 oz (4.3 g) |
| Finish | Polished, heat‑treated |
| Compatibility | AR‑15, M4, and rifles requiring MA0405 ejector spring |
Why Choose Springfield Armory?
Springfield Armory has a legacy of producing reliable, battle‑tested firearms and components. The MA0405 ejector spring reflects the brand’s commitment to quality, ensuring that shooters receive a part that meets rigorous military‑grade standards while delivering exceptional performance for civilian use.
Installation Tips
- Ensure the firearm is unloaded and clear of ammunition.
- Disassemble the bolt carrier group (BCG) according to the manufacturer’s guidelines.
- Locate the existing ejector spring and remove it carefully.
- Insert the new Springfield Armory MA0405 spring, making sure it seats correctly.
- Reassemble the BCG and perform a function test to verify proper ejection.
Customer Reviews
"The new ejector spring from Springfield gave my rifle a noticeable improvement in reliability. No more stovepipes during long range sessions!" – John D.
"Excellent fit and finish. The stainless steel construction resists rust even after field use in humid conditions." – Maria S.
Frequently Asked Questions (FAQ)
Is this spring compatible with all AR‑15 models?
Yes, the MA0405 is designed to fit standard AR‑15 and M4 platforms that use the factory ejector spring size.
Do I need any special tools to install the spring?
No special tools are required. The spring is a direct replacement and can be installed with basic hand tools used for routine BCG maintenance.
Can I use this spring in a rifle with a custom buffer system?
The MA0405 works with most standard buffer systems. For highly customized setups, verify dimensions against your specific configuration.
Order Your Springfield Armory Ejector Spring MA0405 Today
Enhance the performance and reliability of your firearm with a trusted component from Springfield Armory. Click “Add to Cart” now to secure your replacement ejector spring and enjoy smoother operation on the range or in the field.
Keywords: Springfield Armory, Ejector Spring, MA0405, AR‑15 parts, M4 parts, firearm accessories, gun maintenance, stainless steel ejector spring, reliable gun parts
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