Heavy (.308 WIN)
The BFSIII® Carbine Buffer Spring is an increased power buffer spring that is useful for tuning a BFSIII® equipped firearm. This spring will also aid Generation 2 triggers in certain firearms. Since gas system lengths, pressures, and weights may vary, we cannot guarantee that this spring will work in every application. Heavier springs and or increased gas port size may be required for optimized tuning.
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