With the challenges of law enforcement and military in mind trijicon hd night sights is a self-luminous three dot sight set which uses a tritium-phosphor lamp protected within an aluminum sleeve and capped with a sapphire jewel to evenly distribute light and protect from solvents and puncture.They have a metal body with a silicone rubber cushion for shock protection.The u-notched rear sight is angled and serrated to reduce glare while the front sight has a tall blade.The protective clear coat resists powder residue and cleaning solvents to keep the color bright for years.Rear Color: Green w/Black OutlineType: Front/Rear SetFrame Material: MetalFrame Color: BlackFirearm Fit: S&W M&P ShieldStyle: 3 DotFront Material: Tritium/Fiber OpticRear Material: TritiumFront Color: Green Tritium w/Orange OutlineRail Size: N/AWindage Adjustment: NoElevation Adjustment: NoFirearm Type: Handgun