The Phase 5 AR-15 Pistol length buffer spring is a high performance spring specifically designed for AR-15's running with either a pistol length gas system or a standard carbine length gas system. This particular spring in an extra power spring which will provide you with a longer service life as well as improved cycling operation for more consistent performance.

Specifications and Features:
Phase 5 Weapons Systems Pistol Length Buffer Spring PBS
AR-15 Pistol/Carbine Enhanced Buffer Spring
.223 Rem/5.56 NATO
Extra Power Spring
Heat Treated/Corrosion Resistant Steel Wire
Improves cycling/operation
Made in the USA

Fits:
AR-15's with a Pistol/Carbine Gas System