AT3 Tactical Flat Wire AR-15 Buffer Spring


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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.


  • Material: 17-7 Stainless Steel
  • Weight: 1.8 ounces
  • Fit: AR-15 with carbine buffer tubes

Have Questions About this Product?

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.

AT3 Lifetime Warranty Logo

All AT3 Tactical Brand Products carry a lifetime warranty against manufacturer’s defects.

This includes AT3 Red Dot SightsHandguardsIron 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.

Customer Reviews

Based on 3 reviews
Burt L Rosevear
AT3 Flat Wire Springs All Around

AT3 Flat Wire Springs are now the foundation of the reciprocating BCG/buffer mass of my four AR15 lowers. Consistency of performance is a good thing. 36 coil, 17-7SS Flat Wire Springs increase closed bolt lock timing, smooth recoil compression w/o binding, smooth standard force return to battery w no bolt bounce, spring oscillation or “twang.” “On Sale” was also a great selling point. Very happy w this product x4. Thank You 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!

Arthur Cooper


Thanks for sharing your feedback! We're glad you're satisfied with your purchase.

Charles Hajko
Great Spring, Excellent Price

i haven't used it yet so i can't comment on how it performs but i do know the benefits of a flat wire buffer spring. i am sure it will work fine.

Thanks for sharing your feedback! We're glad you're satisfied with your purchase.