HiViz FastDot H3 Features The HiViz FastDot H3 pairs a bright red fiber optic front sight with a green tritium rear sight so the shooter has a fast high-contrast dot in daylight and a self-illuminating reference point when light fades. Because the fiber optic requires no batteries and the tritium is rated to remain visible for roughly 12 years the sight set is ready to perform without maintenance for the life of the product. The front post mounts directly while the rear seats into a standard dovetail keeping installation straightforward on any Glock MOS-pattern slide cut for standard sights. This single low-profile dot design avoids snagging on the draw while still delivering a clear aiming reference under stress. Machined from steel rather than polymer the FastDot H3 stands up to the wear of repeated holstering and daily carry far better than a plastic sight would protecting the sight picture that a defensive shooter depends on. HiViz backs the tritium illumination with a 12-year warranty against failure from workmanship or material defects under normal use giving buyers confidence in the sight s long service life. The set is designed specifically to fit Glock MOS pistols chambered in 9mm .40 S&W and .357 Sig so fitment is straightforward for owners of those models. For shooters who carry a Glock MOS pistol and want dependable low-light capability without adding a red dot the FastDot H3 delivers a proven always-on sight solution. HiViz FastDot H3 Specifications Manufacturer: HiViz Model: FastDot H3 Type: Handgun Sight Set Compatible Hosts: Glock MOS 9mm .40 SW .357 Sig Sight Style: Single Dot Low Profile Front Sight: Red Fiber Optic Rear Sight: Green Tritium Material: Steel Mount Type: Front Post / Rear Dovetail Warranty: 12-Year Tritium Warranty Available At: GrabAGun