Features:Excels in high-stress defensive situationsHigh-contrast color designed for maximum visibility in all light conditionsGlow Dot -convex photoluminescent dot absorbs ambient light and glows in low light levelsLow profile and snag-free design for comfortable carry and fits in most common holstersStandard 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 sightRear Sight Ledge aids in one-handed slide manipulationsLow-profile V provides greater visibility of objects downrange of the front sight