XS Sight Systems Standard Dot Tritium Sight Set Features The XS Sight Systems Standard Dot Tritium Sight Set uses a steel construction paired with a green tritium insert that glows continuously without requiring batteries or an external light source to charge. This self-illuminating technology gives revolver owners a clear aiming reference in low light conditions where fiber optic or plain black sights lose their visibility entirely. Steel construction stands up to the recoil generated by large frame revolvers chambered in heavier calibers maintaining zero through extended use. The Standard Dot design presents a simple fast sight picture that works well for both target shooting and personal defense applications. This sight set is built as a pre-drilled fit specifically for the Smith and Wesson 586 686 625 629 and 329 revolver models simplifying installation for owners of these popular large frame guns. Because the set is matched to these specific models shooters avoid the fitting issues that can come with universal replacement sights. Upgrading factory sights to a tritium set is one of the most practical improvements a revolver owner can make for scenarios where available light cannot be guaranteed. For Smith and Wesson revolver owners who carry or shoot in variable lighting conditions this XS sight set offers a dependable direct-fit upgrade. XS Sight Systems Standard Dot Tritium Sight Set Specifications Manufacturer: XS Sight Systems Model: Standard Dot Tritium Sight Set Material: Steel Tritium Color: Green Compatible Hosts: Smith and Wesson 586 686 625 629 329 Type: Sight Set Available At: GrabAGun