selling my replica trijicon acog with branding. this is fiber optic powered and uses no battery's. only downside to that is it can't be used in dark areas or if you are looking from a darker area to a lighter area. also not that sight for some reason only adjust from center to the right. I never noticed this until today. the gun it was on always fires slightly right. the Reticle also sometimes will come off zero if the sight is hit