Meprolight HVS Highly Visible Day/Night Self-Illuminated Fixed Front Sight S&W M&P Full Size/Compact/Sub-Compact Yellow 0. Shooters can select from one of three colors- Green Yellow or Orange-for the front sight. The tritium is illuminated green to provide low-light and nighttime aiming capabilities. The contrast in colors of the two components helps the shooter focus on the front sight quicker which is critical in defensive and competitive shooting. Specifications for Meprolight HVS Highly Visible Day/Night Self-Illuminated Fixed Front Sight: Manufacturer: Meprolight Gun Make: Smith & Wesson Gun Model: Smith & Wesson M&P Color: Black Front Sight Color: Yellow Rear Sight Color: Green Gun Type: Pistol Package Contents: Meprolight HVS G S&W M&P Full Size/Compact/Sub-Comp Front Meprolight 0417663127: HVS Y S&W M&P Full Size/Compact/Sub-Comp Front Fixed