Timney Triggers Ultimate Builder's Kit, Black, Not Adjustable Alpha Glock 5-UBK-BLACK Starting with Timney's Alpha Competition trigger platform" the Ultimate Builder's Kit for the Glock Gen 5 also includes a striker" striker spring" and connector. The striker and connector are both made from stainless steel and heat treated for long lasting durability. The Timney striker was engineered to match the geometry of the Alpha Competition sear. All Ultimate Builder's Kit parts are NP3 coated for increased lubricity" which creates a smoother feel.