SimonRL
Hellcat
The screw to the battery tray falling out is not uncommon. It has happened to me twice. Holosun even mentions this in the manual and recommends you Loctite the screw whenever you change out the battery. Tonight I caught it before the tray and battery fell out. The screw that holds the tray in is not the same size as the screws used in Holosun’s other pistol optics. I actually keep spares just in case. Blue painters paint actually works better and has a sort of zombie apocalypse quality to it.