Installing Holosun HE508T-GR Green-Dot on my MK3 FiveseveN!
This guide details the installation of a Holosun HE508T-GR green-dot optic onto an FN 5.7 MK3 pistol. The process involves removing the factory plate, selecting the correct mounting plate (identified as #1 in the video), securing the optic with screws, and performing a visual co-witness. The presenter prefers green reticles for daytime visibility and notes the importance of incremental screw tightening.











