Flatwire AR15 Buffer Spring

SKU:
510-2101-001
$17.95
(6 reviews)
Current Stock:
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Ships with KAK Buffer Install Tool

Download .STL file for 3D printing install tool HERE

  • Stainless steel flatwire buffer spring for KAK flatwire wire buffers
  • Designed to work with KAK Industry Select products such as K-SPEC Enhanced Buffer System, CQC Buffer Systems, and Similar KAK Flatwire Products

Reviews

  • 5
    CQC Mini receiver extension, spring, and HB.

    Posted by BigBore on September 13, 2025

    I got the mini CQC heavy buffer, flat wire spring, and mini CQC receiver extension for my 6.5" .30 HRT SBR for use with the Magpul SL-M stock. I wanted to shorten up the OAL with the mini buffer and SL-M stock and was able to take right at an inch off its length. Function is 100% and totally unchanged from the standard CAR receiver extension, CAR buffer spring, and CAR H buffer that was on it initially. I am very happy with the change and have ordered another set for use on an 8" .338 Spectre.

  • 5
    AR9 Function

    Posted by Christopher C Lee on April 22, 2025

    The flatwire compliments my heavy buffer extremely well

  • 5
    AR flatwire buffer spring

    Posted by Chris Johnson on March 20, 2025

    I upgraded my AR9 to the KAK flatwire buffer spring along with the KAK 8.4 oz buffer. I am very happy with the results. A++

  • 5
    Flatwire Buffer Spring

    Posted by Joe on February 9, 2025

    Made a huge difference with the extra stiffness on my AR9 build ,gun cycles flawlessly

  • 5
    flat wire spring

    Posted by Brian L on November 15, 2024

    My go to for most builds. Also use the KAK configurable buffer. Always runs!

  • 5
    Better than expected.

    Posted by Christian R on December 4, 2023

    This buffer spring fits and functions flawlessly. Replaced a rifle length stock with an A5 compatible stock. This flat wire spring and KAK A5H2 buffer is softer than the original system.