The 6-position buffer tube spring, from Tacfire, is made from the same material found in piano wire. This reduces the "twang" you hear when firing your AR. This model is designed for 223/5.56 caliber rifles.
TacFire MAR046 6 Position Buffer Tube Spring
$3.99
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TacFire MAR047A AR15 Buffer Tube Kit Mil-Spec Black AR-15
MSRP:
$38.99
$24.99
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