AR-10 Enhanced Flat Wire Recoil Spring

MSRP: $28.99
Our Price: $19.99
(You save $9.00 )
(3 reviews) Write a Review
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Round wire springs have been the standard since the inception of the AR-15 and AR-10 back in the 1950's. Now we are well into the 21st century, and technology and metallurgy has given way to the Flat Wire Spring and its improved performance! Compared to the industry standard round music wire or chrome silicon springs, our Enhanced Flat Wire Springs have more load on the bolt when it is in battery or fully closed. This means that we can achieve slightly increase dwell time and slow the bolt velocity as it begins moving rearwards. When the bolt is in it's furthest rearward position or locked open, out Flat Wire Springs have the same amount of force on the bolt as traditional round wire springs. What does this all mean? It means our Enhanced Flat Wire Springs act like an extra power round wire spring while cycling as easily as a standard buffer spring! Our Enhanced Flat Wire Springs also have improved vibration harmonics, meaning that bolt bounce is almost entirely eliminated and recoil is smoothed out, even when running an empty buffer or an Ultra Lightweight buffer. That annoying spring rattle or "twang" sound is greatly reduced, and often eliminated with our springs too! Bring your AR into the 21st century with a Bexar Arms Enhanced Flat Wire Recoil Spring!

Our Enhanced Flat Wire Recoil Spring may be a tight fit over the shoulder of your buffer. This is completely normal, and it is not necessary for your to force the spring over the shoulder. Simply install the spring and buffer as is, and after a few shots, the spring will seat itself on the buffer shoulder.

A note from Phillip: If your spring is still rattling once installed, try using some of your favorite automotive grease on the buffer. I personally prefer the full synthetic Lucas X-TRA Heavy Duty "green" type of grease. Your spring should now be completely twang free!


  • Enhanced AR-10 Flat Wire Buffer Spring
  • Optimized for Rifle, Vltor A5, Carbine, and carbine length Pistol receiver extensions
  • Stress Relieved 17-7 PH Stainless Steel construction
  • Improved harmonics smooths cycling and recoil impulse
  • Reduces that annoying AR "twang" or spring rattle
  • Lifetime Warranty against damage or failure!
  • 100% Made in the USA

Recommended Uses:

Use our AR-10 Enhanced Flat Wire Buffer Spring on any gas operated large frame AR calibers and straight blowbacks such as:

  • .308 Win/7.62x51 NATO
  • 6.5 Creedmoor
  • 9mm, 40 S&W, 45 ACP, 10mm, etc. PCC straight blowbacks
  • etc.

Not recommended for use with:

  • Receiver Extensions shorter than Carbine Length
  • .223/5.56
  • .300 Blackout
  • 7.62x39
  • 350 Legend
  • 450 Bushmaster
  • 458 SOCOM
  • 50 Beowulf
  • etc.
While buffer springs are normally a wear item that are replaced in regular service intervals, we are so confident that our Enhanced Flat Wire Springs will never be shot out or damaged from normal shooting that we guarantee it for life! Should you somehow manage to make our Enhanced Flat Wire Buffer Spring fail to do its job, contact us and we will send you a replacement free of charge! Should you try our Flat Wire Spring and decide it's not for you, please contact us for a full refund! We will refund you the cost of the spring, the original shipping charge, AND send you a free return label. Warranty does not apply to any springs that are permanently modified to be used in receiver extensions that are shorter than Carbine Length Buffer Tubes.

3 Reviews Hide Reviews Show Reviews

  • 5
    Simply the Best Spring

    Posted by SMITH on Jun 9th 2020

    Simply, THE BEST. These springs are absolutely the best springs for AR platforms. I have one of these in each AR10 (carbine, mid, rifle) and they’ve made them run a lot smoother. Far less “twang”, and “bounce”. The customer service you get from Bexar Arms is unparalleled. A phenomenal product, excellent customer service, perfectly priced, and fast shipping. I’ll always recommend Bexar Arms! #Flatisjustice

  • 5
    Gets the job done

    Posted by Sam on Jun 5th 2020

    Bought this flat spring to replace my round spring. The flat spring from bexar significantly reduces the "twang" noise from your spring. Add a little grease and your good to go. No failures whatsoever

  • 5
    Fixed my AR-10

    Posted by Hunter on Jun 2nd 2020

    After struggling with (what I thought were) light primer strikes on my AR-10, I saw this as a nice upgrade, not even expecting it to turn my reliability from 1 FTF every ~3 rounds into flawless shooting, but that’s exactly what it did. Turns out my problem was the old spring lacked the power to close the bolt consistently, and this fixed it. Plus the (very loud) spring noise is gone - when pushing hot 308 loadings, the old spring could be quite obnoxious. 100% would recommend