Meprolight Hyper-Bright Glock Standand Frame - O Ring Black Orange Ring. Shooters can select fromone of three colors Green Yellow or Orangefor the frontsight. The tritium is illuminated green to provide low-light and nighttime aiming capabilities. The contrast in colors of thetwo components helps the shooter focus on the front sight quicker which is critical in defensive and competitive shooting. Specifications for Meprolight Highly Visible Day/Night Self-illuminated Sights: Manufacturer: Meprolight Color: Black Sight Style: U-Notch Fabric/Material: Metal Gun Type: Handgun Illumination Type: Tritium Features of Meprolight Highly Visible Day/Night Self-illuminated Sights Large and colored front sight ring The Brightest Tritium night sights Available for various handgun models Package Contents: Meprolight Highly Visible Day/Night Self-illuminated Sights Meprolight 402143131: Hyper-Bright Glock Standand Frame - O Ring Black Orange Ring 402143131