Trijicon H&K 3 Dot Green Front and Orange Rear Night Sight HK08O Fit the H&K USP Compact Three-dot iron sights that increase night-fire shooting accuracy by as much as five times over conventional sights Housed in a metal body and cushioned within silicone rubber No need for batteries Each lamp is capped with a sapphire jewel to help evenly distribute the light while protecting the lamp from solvents and puncture