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The SI Flatwire Spring for is an easy upgrade to any .308 AR system that will greatly improve the performance of the platform. This flatwire spring will increase the service life of your rifle, smooth out the shooting cycle, and outlasts any stock spring on the market. With an increased bolt load and decreased compressing force it improves reliability in cycling. It's cryogenically treated to provide greater consistency, better resilience to high cyclic rates and a much longer spring life. With a cost not much more than a standard stock spring, the SI Flatwire is an easy choice for replacing a worn buffer spring or beginning your new build!
Features and Specifications:
Manufacturer Number: SI-AR10-FWS
Flatwire Spring
Decreased Harmonics
Less System Vibration
No More AR "TWANG!"
Material: Cryo-cycled Chrome-Silicon Steel
Fits:
Standard AR10/SR25 receiver extension lengths
Note: This product is new and being closed out; sold "As Is" and is not returnable to Cheaper Than Dirt. Please contact the manufacturer for warranty and assistance.
The SI Flatwire Spring for is an easy upgrade to any .308 AR system that will greatly improve the performance of the platform. This flatwire spring will increase the service life of your rifle, smooth out the shooting cycle, and outlasts any stock spring on the market. With an increased bolt load and decreased compressing force it improves reliability in cycling. It's cryogenically treated to provide greater consistency, better resilience to high cyclic rates and a much longer spring life. With a cost not much more than a standard stock spring, the SI Flatwire is an easy choice for replacing a worn buffer spring or beginning your new build!
Features and Specifications:
Manufacturer Number: SI-AR10-FWS
Flatwire Spring
Decreased Harmonics
Less System Vibration
No More AR "TWANG!"
Material: Cryo-cycled Chrome-Silicon Steel
Fits:
Standard AR10/SR25 receiver extension lengths
Note: This product is new and being closed out; sold "As Is" and is not returnable to Cheaper Than Dirt. Please contact the manufacturer for warranty and assistance.
Flat wire spring
This spring solved my problem. AR 10 was jamming because bolt was not coming all the way to the rear. I replaced the spring and it works like it is supposed to.
September 22, 2023
Cheap fix for my cycling issues
Love this, my 6.5 creedmoor was not cycling properly, would not feed 2nd round into chamber, bought the flat wire spring and installed and fixed my issue.
May 31, 2022
Great Buffer Spring for AR-45
I picked up this product for my AR-45. I was running a standard length carbine buffer spring for an AR-15 and a H2 buffer and I could feel a very sharp recoil impulse. Upgraded to a 7.7 oz buffer and this buffer spring and the pistol is much more manageable under recoil and I no longer feel the weapon beat itself up upon firing. Be forewarned it is much more difficult to insert in a standard carbine length buffer tube and it is a little harder to charge the bolt. Both are doable though and not a big concern Pros: Dampens Recoil Cons: Hard to insert into carbine length buffer tube
February 11, 2020
Spring time!!
At first glance it reminded of a big sleeping bag with a little sleeping bag case. It doesn't not just slip in the carbine tube like the stock spring as it is a significant amount longer. You kind of have to use your thumbs to walk the last few inches in. Once installed the action feels smooth with less tube/spring audible. It feels as though the same amount of pressure is maintained on the bolt throughout the bcg travel. There is no feel of spring loading at full travel bolt open while keeping the same amount of force near bolt closed. Pros: Equal force- spring force feels consistent. Cons: Not the easiest installation.
March 11, 2019
.308 must have
Put this spring in my .308 sporting rifle build, works great, lessens recoil over the stock spring.
November 15, 2018