XS Big Dot Sights are defensive sights designed to enhance your defense gun. The Ember orange dot provides a high-contrast front sight in bright light and is instantly charged from the sun's UV rays, glowing in shadows and low light settings such as vehicles. Designed to be large and highly visible, these sights help solve many issues, from aging eyes to deteriorating vision. The orange front tends to be most visible in daylight settings. XS Night sights are big, bright, and easy to see day or night! The sights are CNC machined from solid steel bar stock. Features Big Dot front measures 0.188"High-contrast colored front sight Ember dot absorbs ambient light and glows in low lightDurable CNC machined steel