Sig Sauer X-RAY3 Day/Night pistol sights are the perfect upgrade to any pistol. With a half-life of 10 years, the 3-Dot Tritium system allows the user to easily acquire their sights and therefore their target, no matter what the lighting conditions. The front size features an oversized chemical-resistant polymer front dot that provides enhanced durability and visibility. These sights are offered in standard SIG SAUER sizes of #6 and #8 in square or round (U) notched rear sight configurations. These sights will fit the Classic line, P320, P250, P938, and P238. Sig Sauer X-Ray 3 Sight Set Day/Night Suppressor SOX10009