This is a ZEV Technologies Kit known as the PRO Striker Spring, model PK-UPPER-9-PRO.
ZEV created the market for high end GLOCK upgrade parts and continues to offer the most extensive catalogue. From their renown triggers" slides and barrels to the smallest of springs" if you are a serious shooter ZEV has your upgrade. All ZEV Products are proudly made in the USA.
Features:
Works with ZEV or Glock Slide
Includes all Internals
ZEV Back plate
