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The SI Carbine Flat Wire Spring is an economical and easy upgrade to any AR system with a carbine buffer system.  The flatwire spring increases service life of the platform, smooths out the shooting cycle, and greatly outlasts the stock spring.  Increased bolt load, in addition to decreased compression force increases reliability in cycling.  Additionally, all SI Flat Wire springs are cryogenically stress relieved to provide greater consistency, longer spring life, and greater resilience to high cyclic rates.   At a cost not much greater than stock carbine springs, the SI Flatwire is an easy option for those either looking to replace worn buffer springs or begin new builds.  

Product Specs:
– OD: 0.94″
– ID: 0.75″
– Length: 13 7/8″
– Rev: 35
– Gauge (Flat Wire Profile): 0.045″ x 0.0935″

– Cryo-cycled 17-7 ph steel for strength, reliability and longevity
– Decreased harmonics lessens system vibration for faster follow up shots.
– Increased bolt load for more positive feeding
– Reduces distracting AR “twang”

Package includes:
– 1x Carbine Length Flat Wire Spring

WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information:





Strike Industries




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Strike Industries AR Carbine Flat Wire Spring

Our Price:

Strike Industries AR Carbine Flat Wire Spring $21.95
  • MSRP$21.95
  • UPC708747545555

Total in stock: 12

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5004 State Highway 74 Cape Girardeau, MO 63701
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