Meprolight Tru-Dot NS Adjustable Set HK USP Full Size/Expert/Tact Tritium Green 21516 Meprolight Tru-Dot Night Sights Feature unequaled Low-Light Performance as The brightest Night Sights Available. They Are Trusted By Military And Law Enforcement. This Adjustable Set features Self-illuminated Green Tritium In a 3-Dot Configuration. It Is Meant To Use On The USP Full Size Tactical And Expert Pistols. Type: Tritium Front/Rear Frame Color: Black Firearm Fit: HK USP Full Size/Expert/Tactical Style: Adjustable Front Material: Tritium Rear Material: Tritium Front Color: Green Rear Color: Green Windage Adjustment: Yes Elevation Adjustment: Yes Firearm Type: Pistol