Upgrade your competition or training Glock with XS Sights Fiber Optic Sights precision CNC-machined components, a serrated rear sight, and a steel front sight with a bright fiber optic insert for fast sight acquisition, precise alignment, and simple installation. Product Details Bright front sight: Green fiber optic insert for excellent visibility in bright light. Serrated rear sight: Serrated face reduces glare and distractions to improve front-sight focus. Fitment: Fits Glock generations 1 5; compatible with Glock MOS models. Replaceable: User-replaceable fiber optic insert; replacement orange fiber rod included. Made in USA: CNC machined in Fort Worth, TX. Front sight size: 0.215" tall 0.125" wide visible yet narrow for extreme precision. Fiber optic specs: 0.060" diameter fiber gathers light and fluoresces for strong visibility in bright range and competition conditions. Rear notch: 0.145" wide notch with crisp, defined edges for clear sight picture, fast acquisition, and precise alignment. Use case: Ideal for shooters building a dedicated competition or training pistol or for first-time sight upgrades; similar sight picture to R3D and Minimalist sights but optimized for bright lighting. Kit Includes Front sight with green fiber installed Serrated rear sight Replacement orange fiber rod Insert tool and installation instructions