Phase 5 Weapon Systems Inc AR Pistol Enhanced Buffer Spring. Extra power is provided with this buffer spring as well as durability. Improved cycle operation which results in more consistent performance. Heat treated and corrosion-resistant steel wire. Specifications for Phase 5 Weapon Systems Inc AR Pistol Enhanced Buffer Spring PBS: Mfg Item Num: PBS Type: Pistol Tactica: Tactical Master Model Header: Pistol Buffer Spring Features of Phase 5 Weapon Systems Inc AR Pistol Enhanced Buffer Spring PBS Extra power is provided with this buffer spring as well as durability. Improved cycle operation which results in more consistent performance. Heat treated and corrosion-resistant steel wire. For use with AR-15/M16 rifles or pistols chambered in .223/5.56mm. Package Contents: Phase 5 Weapon Systems Inc AR Pistol Enhanced Buffer Spring PBS The Phase 5 Weapon Systems Inc AR Pistol Enhanced Buffer Spring PBS is a quality addition to the Phase 5 Weapon Systems Inc lineup. For more great deals on AR15 Buffer Springs by Phase 5 Weapon Systems Inc please browse our Phase 5 Tactical Gun Parts page. Phase 5 Weapon Systems Inc AR Pistol Enhanced Buffer Spring