Features: Excels in high-stress defensive situations High-contrast color designed for maximum visibility in all light conditions Glow Dot -convex photoluminescent dot absorbs ambient light and glows in low light levels Low profile and snag-free design for comfortable carry and fits in most common holsters Standard Dot remains visible under stress when the focus is drawn downrange. Outside diameter 0.140" Dot-the-"i" Sight Picture - Straight line sight picture with differentiated front and rear sight prevents shooters from confusing the front and rear sight Rear Sight Ledge aids in one-handed slide manipulations Low-profile V provides greater visibility of objects downrange of the front sight