Meprolight Hyper-Bright V-Sight S&W M&P Non-Or Sd/Sdve - O Ring Black Orange Ring. These self-illuminated fixed tritium sights feature extremely fast and intuitive V Shaped Rear sighting system creating easy intuative target acquisition together with an extremely bright colored ring front sight in your choice of green yelloworange or blue delivering maximum visibility as a night sight or day-night sight.ALWAYS ON: Tritium powered No batteries no switches always on always ready 24/7/365. Premium grade green Tritium vials in the front and rear allow for low light and nighttime conditions. Maintenance-free can be mounted directly with no weapon modifications.HIGH DURABILITY: The MEPRO HYPER-BRIGHT sights are drop- and shockproof built for endless rounds under heavy recoil made of steel and an excellent upgrade sight to your pistol. Its ultralight snag-free design is easy to draw and gives you instinctive aiming under pressure. Trusted by law enforcement and military personnel these sights are reliable in any weather conditions. Specifications for Meprolight Hyper-Bright V-Sights: Manufacturer: Meprolight Color: Black Front Sight Color: Orange Gun Type: Pistol Illumination Type: Tritium Illumination Color: Orange Package Contents: Meprolight Hyper-Bright V-Sights Meprolight 417103131: Hyper-Bright V-Sight S&W M&P Non-Or Sd/Sdve - O Ring Black Orange Ring 417103131