AR-15 Flat-Wire Buffer Spring, 40 Coil | 5.56 NATO/300 BLK/7.62x40 WT | 6.8 SPC II/6.5 Grendel/.458 SOCOM
The chrome silicon flat-wire spring increases service life of the AR platform, smooths out the shooting cycle, and greatly outlasts the stock spring. In addition, it has a more linear compression with less stacking increases reliability.
Standard power spring is appropriate for most standard AR-15 calibers.
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