Getting an accurate, first-round hit in a self-defense situation is critical, and having the right sights to get the job done is paramount. The design behind XS Sights DXT2 Big Dot night sights ensures that handgun owners can get their pistols on-target faster and easier than ever before. Each pair of XS Sights DXT2 Big Dot night sights are built with a tritium-illuminated, round front sight that allow for fast targeting in the dark, while a photoluminescent ring around the tritium lamp also allows for easy aiming when moving from bright to dark environments. The front sight is combined with the company's rear-sight design that incorporates a vertical, tritium-illuminated stripe. Mfg: Xs Sight Systems