AR-15 Flat-Wire Buffer Spring, 37 Coil | 5.56/.223

The chrome silicon flat-wire spring increases the 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 and increases reliability.

• Standard power spring is appropriate for most standard AR-15 calibers
• For AR pistols/rifles with pistol/carbine-length buffer tubes