AT3 Tactical Flat Wire AR-15 Buffer Spring
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Product description
Improve Your AR-15’s Recoil with a Flat Wire Buffer Spring
Made in the USA with cryo-treated 17-7 stainless steel, this flat wire recoil spring drops into your buffer tube to upgrade your recoil system. This spring dampens recoil when the gun is cycling, and increases the load on the rear of the bolt carrier to ensure reliable lockup into battery. This spring is sized for carbine buffer tubes, which is common for the vast majority of AR-15s with adjustable stocks.
Why is a flat wire spring better?
Traditional piano wire recoil springs tend to bind up and rattle inside the buffer tube. A flat wire spring not only minimizes noise, but also doesn’t bind. The flat steel flexes without coils getting bunched together while the gun is cycling. The compact size of each coil also allows more energy to be stored in the spring; this is what increases the force on the back of the BCG.
Specifications
- Material: 17-7 Stainless Steel
- Weight: 1.8 ounces
- Fit: AR-15 with carbine buffer tubes
Customer reviews 10
Verified buyerAT3 Tactical · Hi there! Thank you for taking the time to leave a review. We're so glad to hear that you upgraded to our flat wire AR spring and H2 buffer and are feeling a noticeable difference. We appreciate your support and hope you continue to enjoy your improved AR experience. Happy shooting!
AT3 Tactical · Thank you for taking the time to leave a review! We are so glad to hear that our AT3 Tactical Flat Wire AR-15 Buffer Spring was able to help you with gas tuning and improve your ejection pattern. We take pride in providing high-quality products that can withstand repeated use. Happy shooting!
AT3 Tactical · Thank you for taking the time to leave a review for our AT3 Tactical Flat Wire AR-15 Buffer Spring. We are glad to hear that it helped resolve your overgassing issue with your AR AK47 caliber. Our flat spring and adjustable gas tube are designed to work together to provide optimal performance. We appreciate your feedback and hope to continue providing you with quality products in the future.
AT3 Tactical · Thank you for taking the time to leave a review for our AT3 Tactical Flat Wire AR-15 Buffer Spring. We are thrilled to hear that you are satisfied with your purchase. If you have any questions or concerns in the future, please don't hesitate to reach out to us. Happy shooting!
AT3 Tactical · Thank you for taking the time to leave a review, we truly appreciate it! We are thrilled to hear that the AT3 Flat Wire Springs have improved the performance of your AR15 lowers and that you are happy with your purchase. Our goal is to consistently provide high-quality products and we are glad to hear that we have met your expectations. Thank you for choosing AT3 Tactical!
AT3 Tactical · Thanks for sharing your feedback! We're glad you're satisfied with your purchase.
AT3 Tactical · Thanks for sharing your feedback! We're glad you're satisfied with your purchase.
Questions & Answers 4
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Will this help cycling with an AR15 SBR rifle that has a FRT?
Christopher · Aug 11, 2026AT3 Support Team — Yes, its consistent spring tension prevents bolt bounce and stabilizes rate-of-fire, making it a great upgrade for improving cycling reliability with an FRT on an SBR.
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Is this the correct buffer spring for use with a 16-in AR and an frt trigger assembly?
Ken Madden · Jul 1, 2026AT3 Support Team — Yes, it is an excellent choice for an FRT build because flat wire springs provide increased forward tension to ensure the bolt fully locks into battery for a reliable reset, but you must pair it with a heavier buffer (like an H2 or H3) rather than a standard carbine buffer to prevent timing malfunctions.
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What’s the length of this spring. Mine is a commercial spec buffer tube and the spring is just under 11” will this one work?
Frank · Jan 4, 2026AT3 Support Team — The AT3 Flat Wire AR-15 Buffer Spring measures ~10.5-11" uncompressed and fits carbine buffer tubes, including commercial spec—yours at just under 11" should work fine.
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Will this buffer ring fit a regular 16" AR-15?
Joe Hernandez · Dec 10, 2024AT3 Support Team — Yes, the AT3 Tactical Flat Wire AR-15 Buffer Spring is designed to fit a standard 16" AR-15.
Warranty & returns
Backed by the AT3 Lifetime Warranty!
All AT3 Tactical Brand Products carry a lifetime warranty against manufacturer’s defects.
This includes AT3 Red Dot Sights, Handguards, Iron Sights, and any other product that carries the “AT3 Tactical” or “AT3™” name. For other brands (ex. Magpul or Troy), please refer to the manufacturer’s warranty policy.
In the event that your AT3™ product becomes unusable, we will repair or replace the product at no charge to you.
If we cannot repair your product, we will replace it with a product in perfect working order of equal or better physical condition. The warranty is fully transferable, but we may require information about the original purchase to validate the authenticity of the product.
If your product is in need of warranty service, please contact AT3 Tactical to start the process
Our contact info is available here. To expedite processing, please provide your order information and description of the defect.
Please note: The AT3 Lifetime Warranty does not cover loss, theft, intentional damage or cosmetic damage that doesn’t affect the performance of the product.
90-day no-hassle returns
The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.
If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.
