The Meprolight Tru-Dot R4E Green/Green Suppressor Height Fixed Night Sight Set is a Special Forces-developed tritium sight system for H&K HK45, HK45C, P30, VP9, and SFP9 pistols (excluding the VP2020), machined to suppressor height for seamless use with suppressors and optics-ready slides while delivering the R4E's unique five-element crosshair sight picture. Both front and rear sights feature vivid green tritium vials paired with white alignment lines — a vertical line on the front and horizontal lines on the rear — creating a fast, instinctive crosshair-style aiming reference that dramatically reduces target acquisition time over a traditional 3-dot system. Drop-proof, shockproof, maintenance-free, and backed by Meprolight's 12-year tritium illumination guarantee, these sights install directly into the factory dovetail cuts with no slide modifications required.