Meprolight Tru-Dot, Fixed Tritium Sights, Green/Orange, Fits HK USP Compact 9/40S&W/45ACP 0115173301 MEPROLIGHT's combat-proven self-illuminated night sights enable you to upgrade your capabilities to hit stationary or moving targets under low-light conditions with dramatically increased hit probability. Designed as replacement parts for the standard weapon sights" Meprolight's Self-Illuminated night sights can be mounted directly with minor modifications. Meprolight leads the world in OEM and after-market self-illuminated sights for handguns. Designed to replace the existing front and rear sights" the highly visible Tru-Dot sights are perfect for daylight" low-light" and nighttime conditions.