JP has developed a new high grade extra power buffer spring for AR-10 rifles with collapsible stocks. It is custom made to JP specifications. Center-less ground and polished on outside edge to a mirror finish for silent, smooth operation. 7% more powerful spring rate for improved impulse feel resulting in faster sight recovery and improved reliability. This spring will make your 308 cal AR carbine sound quieter and smoother. This is an inexpensive way to improve the sound, feel and reliability of your AR-10 carbine. The length and power of this spring falls between a factory standard power spring and a Sprinco .308 carbine extra power spring.

*Designed for .308/7.62mm AR style carbines with M4 length, 7" deep buffer tubes and 2.5" buffers.